72564422 has 16 divisors (see below), whose sum is σ = 124615680. Its totient is φ = 31044168.

The previous prime is 72564421. The next prime is 72564431. The reversal of 72564422 is 22446527.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72564421) 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, 4229 + ... + 12767.

It is an arithmetic number, because the mean of its divisors is an integer number (7788480).

Almost surely, 2^72564422 is an apocalyptic number.

72564422 is a deficient number, since it is larger than the sum of its proper divisors (52051258).

72564422 is a wasteful number, since it uses less digits than its factorization.

72564422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9155.

The product of its digits is 26880, while the sum is 32.

The square root of 72564422 is about 8518.4753330628. The cubic root of 72564422 is about 417.1010150799.

The spelling of 72564422 in words is "seventy-two million, five hundred sixty-four thousand, four hundred twenty-two".