23578728 has 32 divisors (see below), whose sum is σ = 62415360. Its totient is φ = 7397120.

The previous prime is 23578721. The next prime is 23578729. The reversal of 23578728 is 82787532.

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 23578728.

It is not an unprimeable number, because it can be changed into a prime (23578721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28488 + ... + 29303.

It is an arithmetic number, because the mean of its divisors is an integer number (1950480).

Almost surely, 2^23578728 is an apocalyptic number.

It is an amenable number.

23578728 is an abundant number, since it is smaller than the sum of its proper divisors (38836632).

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

23578728 is a wasteful number, since it uses less digits than its factorization.

23578728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57817 (or 57813 counting only the distinct ones).

The product of its digits is 188160, while the sum is 42.

The square root of 23578728 is about 4855.7932410678. The cubic root of 23578728 is about 286.7522213241.

The spelling of 23578728 in words is "twenty-three million, five hundred seventy-eight thousand, seven hundred twenty-eight".