72439564 has 12 divisors (see below), whose sum is σ = 131140800. Its totient is φ = 34970768.

The previous prime is 72439541. The next prime is 72439573. The reversal of 72439564 is 46593427.

It is a happy number.

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, 312124 + ... + 312355.

It is an arithmetic number, because the mean of its divisors is an integer number (10928400).

Almost surely, 2^72439564 is an apocalyptic number.

It is an amenable number.

72439564 is a deficient number, since it is larger than the sum of its proper divisors (58701236).

72439564 is a wasteful number, since it uses less digits than its factorization.

72439564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624512 (or 624510 counting only the distinct ones).

The product of its digits is 181440, while the sum is 40.

The square root of 72439564 is about 8511.1435189403. The cubic root of 72439564 is about 416.8616493997.

It can be divided in two parts, 7243 and 9564, that added together give a 5-th power (16807 = 7⁵).

The spelling of 72439564 in words is "seventy-two million, four hundred thirty-nine thousand, five hundred sixty-four".