23729928 has 32 divisors (see below), whose sum is σ = 61905600. Its totient is φ = 7565888.

The previous prime is 23729903. The next prime is 23729957. The reversal of 23729928 is 82992732.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 23729928.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20943 + ... + 22046.

It is an arithmetic number, because the mean of its divisors is an integer number (1934550).

Almost surely, 2^23729928 is an apocalyptic number.

It is an amenable number.

23729928 is an abundant number, since it is smaller than the sum of its proper divisors (38175672).

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

23729928 is a wasteful number, since it uses less digits than its factorization.

23729928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43021 (or 43017 counting only the distinct ones).

The product of its digits is 108864, while the sum is 42.

The square root of 23729928 is about 4871.3373933654. The cubic root of 23729928 is about 287.3638543790.

The spelling of 23729928 in words is "twenty-three million, seven hundred twenty-nine thousand, nine hundred twenty-eight".