123256864 has 24 divisors (see below), whose sum is σ = 243326160. Its totient is φ = 61459776.

The previous prime is 123256849. The next prime is 123256867. The reversal of 123256864 is 468652321.

It is a super-2 number, since 2×123256864² = 30384509046228992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123256867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7047 + ... + 17209.

It is an arithmetic number, because the mean of its divisors is an integer number (10138590).

Almost surely, 2^123256864 is an apocalyptic number.

It is an amenable number.

123256864 is a deficient number, since it is larger than the sum of its proper divisors (120069296).

123256864 is a wasteful number, since it uses less digits than its factorization.

123256864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10552 (or 10544 counting only the distinct ones).

The product of its digits is 69120, while the sum is 37.

The square root of 123256864 is about 11102.1107902957. The cubic root of 123256864 is about 497.6649305440.

The spelling of 123256864 in words is "one hundred twenty-three million, two hundred fifty-six thousand, eight hundred sixty-four".