72715976 has 8 divisors (see below), whose sum is σ = 136342470. Its totient is φ = 36357984.

The previous prime is 72715961. The next prime is 72716011. The reversal of 72715976 is 67951727.

It can be written as a sum of positive squares in only one way, i.e., 70123876 + 2592100 = 8374^2 + 1610^2 .

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

It is a super-2 number, since 2×72715976² = 10575226331265152, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4544741 + ... + 4544756.

Almost surely, 2^72715976 is an apocalyptic number.

It is an amenable number.

72715976 is a deficient number, since it is larger than the sum of its proper divisors (63626494).

72715976 is a wasteful number, since it uses less digits than its factorization.

72715976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9089503 (or 9089499 counting only the distinct ones).

The product of its digits is 185220, while the sum is 44.

The square root of 72715976 is about 8527.3662991571. The cubic root of 72715976 is about 417.3911911219.

The spelling of 72715976 in words is "seventy-two million, seven hundred fifteen thousand, nine hundred seventy-six".