725309328 has 40 divisors (see below), whose sum is σ = 1874774848. Its totient is φ = 241633152.

The previous prime is 725309303. The next prime is 725309339. The reversal of 725309328 is 823903527.

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, 117126 + ... + 123162.

Almost surely, 2^725309328 is an apocalyptic number.

It is an amenable number.

725309328 is an abundant number, since it is smaller than the sum of its proper divisors (1149465520).

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

725309328 is a wasteful number, since it uses less digits than its factorization.

725309328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8551 (or 8545 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 725309328 is about 26931.5674998690. The cubic root of 725309328 is about 898.4786346624.

The spelling of 725309328 in words is "seven hundred twenty-five million, three hundred nine thousand, three hundred twenty-eight".