725724928 has 36 divisors (see below), whose sum is σ = 1483968528. Its totient is φ = 354007040.

The previous prime is 725724907. The next prime is 725724947. The reversal of 725724928 is 829427527.

It is a super-2 number, since 2×725724928² = 1053353342241210368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24076 + ... + 45067.

It is an arithmetic number, because the mean of its divisors is an integer number (41221348).

Almost surely, 2^725724928 is an apocalyptic number.

It is an amenable number.

725724928 is an abundant number, since it is smaller than the sum of its proper divisors (758243600).

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

725724928 is an equidigital number, since it uses as much as digits as its factorization.

725724928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69200 (or 69186 counting only the distinct ones).

The product of its digits is 564480, while the sum is 46.

The square root of 725724928 is about 26939.2822473057. The cubic root of 725724928 is about 898.6502103880.

The spelling of 725724928 in words is "seven hundred twenty-five million, seven hundred twenty-four thousand, nine hundred twenty-eight".