725718128 has 20 divisors (see below), whose sum is σ = 1420003608. Its totient is φ = 359265600.

The previous prime is 725718101. The next prime is 725718157. The reversal of 725718128 is 821817527.

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, 222926 + ... + 226157.

Almost surely, 2^725718128 is an apocalyptic number.

It is an amenable number.

725718128 is a deficient number, since it is larger than the sum of its proper divisors (694285480).

725718128 is a wasteful number, since it uses less digits than its factorization.

725718128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449192 (or 449186 counting only the distinct ones).

The product of its digits is 62720, while the sum is 41.

The square root of 725718128 is about 26939.1560372629. The cubic root of 725718128 is about 898.6474036126.

The spelling of 725718128 in words is "seven hundred twenty-five million, seven hundred eighteen thousand, one hundred twenty-eight".