725429644 has 12 divisors (see below), whose sum is σ = 1344178584. Its totient is φ = 341378624.

The previous prime is 725429623. The next prime is 725429669. The reversal of 725429644 is 446924527.

It is a self number, because there is not a number n which added to its sum of digits gives 725429644.

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, 5333974 + ... + 5334109.

It is an arithmetic number, because the mean of its divisors is an integer number (112014882).

Almost surely, 2^725429644 is an apocalyptic number.

It is an amenable number.

725429644 is a deficient number, since it is larger than the sum of its proper divisors (618748940).

725429644 is a wasteful number, since it uses less digits than its factorization.

725429644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10668104 (or 10668102 counting only the distinct ones).

The product of its digits is 483840, while the sum is 43.

The square root of 725429644 is about 26933.8011428020. The cubic root of 725429644 is about 898.5283124915.

The spelling of 725429644 in words is "seven hundred twenty-five million, four hundred twenty-nine thousand, six hundred forty-four".