[go: up one dir, main page]

Search a number
-
+
230785980 = 22354781839
BaseRepresentation
bin11011100000110…
…00001110111100
3121002021010211220
431300120032330
5433040122410
634522313340
75501435265
oct1560301674
9532233756
10230785980
111092aaa17
1265358850
1338a75c69
142291796c
15153db070
hexdc183bc

230785980 has 48 divisors (see below), whose sum is σ = 659957760. Its totient is φ = 60232768.

The previous prime is 230785949. The next prime is 230785981. The reversal of 230785980 is 89587032.

230785980 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230785981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38100 + ... + 43739.

It is an arithmetic number, because the mean of its divisors is an integer number (13749120).

Almost surely, 2230785980 is an apocalyptic number.

230785980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

230785980 is an abundant number, since it is smaller than the sum of its proper divisors (429171780).

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

230785980 is a wasteful number, since it uses less digits than its factorization.

230785980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81898 (or 81896 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 230785980 is about 15191.6417809268. The cubic root of 230785980 is about 613.3896930198.

The spelling of 230785980 in words is "two hundred thirty million, seven hundred eighty-five thousand, nine hundred eighty".

Divisors: 1 2 3 4 5 6 10 12 15 20 30 47 60 94 141 188 235 282 470 564 705 940 1410 2820 81839 163678 245517 327356 409195 491034 818390 982068 1227585 1636780 2455170 3846433 4910340 7692866 11539299 15385732 19232165 23078598 38464330 46157196 57696495 76928660 115392990 230785980