72725706 has 12 divisors (see below), whose sum is σ = 157572402. Its totient is φ = 24241896.

The previous prime is 72725687. The next prime is 72725713. The reversal of 72725706 is 60752727.

It can be written as a sum of positive squares in only one way, i.e., 49829481 + 22896225 = 7059^2 + 4785^2 .

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 5 ways as a sum of consecutive naturals, for example, 2020141 + ... + 2020176.

Almost surely, 2^72725706 is an apocalyptic number.

72725706 is an abundant number, since it is smaller than the sum of its proper divisors (84846696).

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

72725706 is a wasteful number, since it uses less digits than its factorization.

72725706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4040325 (or 4040322 counting only the distinct ones).

The product of its (nonzero) digits is 41160, while the sum is 36.

The square root of 72725706 is about 8527.9367962011. The cubic root of 72725706 is about 417.4098070913.

The spelling of 72725706 in words is "seventy-two million, seven hundred twenty-five thousand, seven hundred six".