725540820 has 24 divisors (see below), whose sum is σ = 2031514464. Its totient is φ = 193477536.

The previous prime is 725540801. The next prime is 725540831. The reversal of 725540820 is 28045527.

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, 6046114 + ... + 6046233.

It is an arithmetic number, because the mean of its divisors is an integer number (84646436).

Almost surely, 2^725540820 is an apocalyptic number.

It is an amenable number.

725540820 is an abundant number, since it is smaller than the sum of its proper divisors (1305973644).

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

725540820 is a wasteful number, since it uses less digits than its factorization.

725540820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12092359 (or 12092357 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 33.

The square root of 725540820 is about 26935.8649387763. The cubic root of 725540820 is about 898.5742115812.

The spelling of 725540820 in words is "seven hundred twenty-five million, five hundred forty thousand, eight hundred twenty".