725979728 has 40 divisors (see below), whose sum is σ = 1476655488. Its totient is φ = 345099392.

The previous prime is 725979697. The next prime is 725979739. The reversal of 725979728 is 827979527.

It is a congruent number.

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, 55550 + ... + 67362.

Almost surely, 2^725979728 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 725979728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (738327744).

725979728 is an abundant number, since it is smaller than the sum of its proper divisors (750675760).

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

725979728 is a wasteful number, since it uses less digits than its factorization.

725979728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12011 (or 12005 counting only the distinct ones).

The product of its digits is 4445280, while the sum is 56.

The square root of 725979728 is about 26944.0109857460. The cubic root of 725979728 is about 898.7553692769.

The spelling of 725979728 in words is "seven hundred twenty-five million, nine hundred seventy-nine thousand, seven hundred twenty-eight".