725296138 has 32 divisors (see below), whose sum is σ = 1271433600. Its totient is φ = 310181760.

The previous prime is 725296031. The next prime is 725296157. The reversal of 725296138 is 831692527.

It is a junction number, because it is equal to n+sod(n) for n = 725296094 and 725296103.

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 15 ways as a sum of consecutive naturals, for example, 460893 + ... + 462463.

It is an arithmetic number, because the mean of its divisors is an integer number (39732300).

Almost surely, 2^725296138 is an apocalyptic number.

725296138 is a deficient number, since it is larger than the sum of its proper divisors (546137462).

725296138 is a wasteful number, since it uses less digits than its factorization.

725296138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2267 (or 2253 counting only the distinct ones).

The product of its digits is 181440, while the sum is 43.

The square root of 725296138 is about 26931.3226188392. The cubic root of 725296138 is about 898.4731882482.

The spelling of 725296138 in words is "seven hundred twenty-five million, two hundred ninety-six thousand, one hundred thirty-eight".