72791456 has 12 divisors (see below), whose sum is σ = 143308242. Its totient is φ = 36395712.

The previous prime is 72791449. The next prime is 72791491. The reversal of 72791456 is 65419727.

It can be written as a sum of positive squares in only one way, i.e., 57456400 + 15335056 = 7580^2 + 3916^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1137335 + ... + 1137398.

Almost surely, 2^72791456 is an apocalyptic number.

It is an amenable number.

72791456 is a deficient number, since it is larger than the sum of its proper divisors (70516786).

72791456 is a wasteful number, since it uses less digits than its factorization.

72791456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2274743 (or 2274735 counting only the distinct ones).

The product of its digits is 105840, while the sum is 41.

The square root of 72791456 is about 8531.7909022667. The cubic root of 72791456 is about 417.5355600964.

The spelling of 72791456 in words is "seventy-two million, seven hundred ninety-one thousand, four hundred fifty-six".