23929728 has 64 divisors (see below), whose sum is σ = 64296720. Its totient is φ = 7884800.

The previous prime is 23929723. The next prime is 23929733. The reversal of 23929728 is 82792932.

It is an interprime number because it is at equal distance from previous prime (23929723) and next prime (23929733).

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 23929728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23929723) 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, 38476 + ... + 39092.

Almost surely, 2^23929728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23929728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32148360).

23929728 is an abundant number, since it is smaller than the sum of its proper divisors (40366992).

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

23929728 is a wasteful number, since it uses less digits than its factorization.

23929728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735 (or 723 counting only the distinct ones).

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

The square root of 23929728 is about 4891.8021219179. The cubic root of 23929728 is about 288.1681117271.

The spelling of 23929728 in words is "twenty-three million, nine hundred twenty-nine thousand, seven hundred twenty-eight".