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230065680 = 243513193881
BaseRepresentation
bin11011011011010…
…00011000010000
3121000220112210010
431231220120100
5432344100210
634455034520
75462345265
oct1555503020
9530815703
10230065680
11108958829
126506ba40
1338883150
14227ab26c
15152e7920
hexdb68610

230065680 has 160 divisors (see below), whose sum is σ = 808698240. Its totient is φ = 53637120.

The previous prime is 230065679. The next prime is 230065681. The reversal of 230065680 is 86560032.

It is an interprime number because it is at equal distance from previous prime (230065679) and next prime (230065681).

It is a super-2 number, since 2×2300656802 = 105860434227724800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (230065681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57340 + ... + 61220.

It is an arithmetic number, because the mean of its divisors is an integer number (5054364).

Almost surely, 2230065680 is an apocalyptic number.

230065680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 230065680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (404349120).

230065680 is an abundant number, since it is smaller than the sum of its proper divisors (578632560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

230065680 is a wasteful number, since it uses less digits than its factorization.

230065680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3929 (or 3923 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 230065680 is about 15167.9161390087. The cubic root of 230065680 is about 612.7508832010.

The spelling of 230065680 in words is "two hundred thirty million, sixty-five thousand, six hundred eighty".

Divisors: 1 2 3 4 5 6 8 10 12 13 15 16 19 20 24 26 30 38 39 40 48 52 57 60 65 76 78 80 95 104 114 120 130 152 156 190 195 208 228 240 247 260 285 304 312 380 390 456 494 520 570 624 741 760 780 912 988 1040 1140 1235 1482 1520 1560 1976 2280 2470 2964 3120 3705 3881 3952 4560 4940 5928 7410 7762 9880 11643 11856 14820 15524 19405 19760 23286 29640 31048 38810 46572 50453 58215 59280 62096 73739 77620 93144 100906 116430 147478 151359 155240 186288 201812 221217 232860 252265 294956 302718 310480 368695 403624 442434 465720 504530 589912 605436 737390 756795 807248 884868 931440 958607 1009060 1106085 1179824 1210872 1474780 1513590 1769736 1917214 2018120 2212170 2421744 2875821 2949560 3027180 3539472 3834428 4036240 4424340 4793035 5751642 5899120 6054360 7668856 8848680 9586070 11503284 12108720 14379105 15337712 17697360 19172140 23006568 28758210 38344280 46013136 57516420 76688560 115032840 230065680