72456818 has 16 divisors (see below), whose sum is σ = 124327104. Its totient is φ = 31024080.

The previous prime is 72456817. The next prime is 72456821. The reversal of 72456818 is 81865427.

It is not an unprimeable number, because it can be changed into a prime (72456817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21188 + ... + 24368.

It is an arithmetic number, because the mean of its divisors is an integer number (7770444).

Almost surely, 2^72456818 is an apocalyptic number.

72456818 is a deficient number, since it is larger than the sum of its proper divisors (51870286).

72456818 is a wasteful number, since it uses less digits than its factorization.

72456818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4817.

The product of its digits is 107520, while the sum is 41.

The square root of 72456818 is about 8512.1570709192. The cubic root of 72456818 is about 416.8947434693.

The spelling of 72456818 in words is "seventy-two million, four hundred fifty-six thousand, eight hundred eighteen".