72557474 has 16 divisors (see below), whose sum is σ = 120359520. Its totient is φ = 32528160.

The previous prime is 72557467. The next prime is 72557489. The reversal of 72557474 is 47475527.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20984 + ... + 24195.

It is an arithmetic number, because the mean of its divisors is an integer number (7522470).

Almost surely, 2^72557474 is an apocalyptic number.

72557474 is a deficient number, since it is larger than the sum of its proper divisors (47802046).

72557474 is a wasteful number, since it uses less digits than its factorization.

72557474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45265.

The product of its digits is 274400, while the sum is 41.

The square root of 72557474 is about 8518.0675038415. The cubic root of 72557474 is about 417.0877022641.

The spelling of 72557474 in words is "seventy-two million, five hundred fifty-seven thousand, four hundred seventy-four".