725858440 has 32 divisors (see below), whose sum is σ = 1637415000. Its totient is φ = 289590784.

The previous prime is 725858431. The next prime is 725858453. The reversal of 725858440 is 44858527.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 540190564 + 185667876 = 23242^2 + 13626^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7765 + ... + 38884.

Almost surely, 2^725858440 is an apocalyptic number.

It is an amenable number.

725858440 is an abundant number, since it is smaller than the sum of its proper divisors (911556560).

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

725858440 is a wasteful number, since it uses less digits than its factorization.

725858440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47049 (or 47045 counting only the distinct ones).

The product of its (nonzero) digits is 358400, while the sum is 43.

The square root of 725858440 is about 26941.7601503688. The cubic root of 725858440 is about 898.7053153942.

The spelling of 725858440 in words is "seven hundred twenty-five million, eight hundred fifty-eight thousand, four hundred forty".