72347656 has 16 divisors (see below), whose sum is σ = 135867600. Its totient is φ = 36116304.

The previous prime is 72347621. The next prime is 72347669. The reversal of 72347656 is 65674327.

It is an alternating number because its digits alternate between odd and even.

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 3 ways as a sum of consecutive naturals, for example, 1590 + ... + 12133.

It is an arithmetic number, because the mean of its divisors is an integer number (8491725).

Almost surely, 2^72347656 is an apocalyptic number.

It is an amenable number.

72347656 is a deficient number, since it is larger than the sum of its proper divisors (63519944).

72347656 is a wasteful number, since it uses less digits than its factorization.

72347656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14388 (or 14384 counting only the distinct ones).

The product of its digits is 211680, while the sum is 40.

The square root of 72347656 is about 8505.7425307847. The cubic root of 72347656 is about 416.6852764666.

The spelling of 72347656 in words is "seventy-two million, three hundred forty-seven thousand, six hundred fifty-six".