72725992 has 8 divisors (see below), whose sum is σ = 136361250. Its totient is φ = 36362992.

The previous prime is 72725971. The next prime is 72726007. The reversal of 72725992 is 29952727.

It can be written as a sum of positive squares in only one way, i.e., 60933636 + 11792356 = 7806^2 + 3434^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4545367 + ... + 4545382.

Almost surely, 2^72725992 is an apocalyptic number.

It is an amenable number.

72725992 is a deficient number, since it is larger than the sum of its proper divisors (63635258).

72725992 is a wasteful number, since it uses less digits than its factorization.

72725992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9090755 (or 9090751 counting only the distinct ones).

The product of its digits is 158760, while the sum is 43.

The square root of 72725992 is about 8527.9535646015. The cubic root of 72725992 is about 417.4103542571.

The spelling of 72725992 in words is "seventy-two million, seven hundred twenty-five thousand, nine hundred ninety-two".