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23120860 = 2257239691
BaseRepresentation
bin101100000110…
…0101111011100
31121111122212011
41120030233130
521404331420
62143321004
7400344520
oct130145734
947448764
1023120860
1112062054
1278b0164
134a36aa9
1430dbd80
15206a95a
hex160cbdc

23120860 has 48 divisors (see below), whose sum is σ = 55802880. Its totient is φ = 7882560.

The previous prime is 23120857. The next prime is 23120873. The reversal of 23120860 is 6802132.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33115 + ... + 33805.

It is an arithmetic number, because the mean of its divisors is an integer number (1162560).

Almost surely, 223120860 is an apocalyptic number.

23120860 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 23120860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27901440).

23120860 is an abundant number, since it is smaller than the sum of its proper divisors (32682020).

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

23120860 is a wasteful number, since it uses less digits than its factorization.

23120860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946 (or 944 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 23120860 is about 4808.4155394475. The cubic root of 23120860 is about 284.8839580932.

Adding to 23120860 its reverse (6802132), we get a palindrome (29922992).

The spelling of 23120860 in words is "twenty-three million, one hundred twenty thousand, eight hundred sixty".

Divisors: 1 2 4 5 7 10 14 20 28 35 70 140 239 478 691 956 1195 1382 1673 2390 2764 3346 3455 4780 4837 6692 6910 8365 9674 13820 16730 19348 24185 33460 48370 96740 165149 330298 660596 825745 1156043 1651490 2312086 3302980 4624172 5780215 11560430 23120860