725155628 has 6 divisors (see below), whose sum is σ = 1269022356. Its totient is φ = 362577812.

The previous prime is 725155579. The next prime is 725155631. The reversal of 725155628 is 826551527.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90644450 + ... + 90644457.

It is an arithmetic number, because the mean of its divisors is an integer number (211503726).

Almost surely, 2^725155628 is an apocalyptic number.

It is an amenable number.

725155628 is a deficient number, since it is larger than the sum of its proper divisors (543866728).

725155628 is a wasteful number, since it uses less digits than its factorization.

725155628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181288911 (or 181288909 counting only the distinct ones).

The product of its digits is 168000, while the sum is 41.

The square root of 725155628 is about 26928.7138200100. The cubic root of 725155628 is about 898.4151647668.

The spelling of 725155628 in words is "seven hundred twenty-five million, one hundred fifty-five thousand, six hundred twenty-eight".