72539568 has 60 divisors (see below), whose sum is σ = 213702840. Its totient is φ = 22906368.

The previous prime is 72539567. The next prime is 72539569. The reversal of 72539568 is 86593527.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (72539567) and next prime (72539569).

It is not an unprimeable number, because it can be changed into a prime (72539567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10521 + ... + 15992.

It is an arithmetic number, because the mean of its divisors is an integer number (3561714).

Almost surely, 2^72539568 is an apocalyptic number.

It is an amenable number.

72539568 is an abundant number, since it is smaller than the sum of its proper divisors (141163272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72539568 is a wasteful number, since it uses less digits than its factorization.

72539568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26546 (or 26537 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The square root of 72539568 is about 8517.0163789909. The cubic root of 72539568 is about 417.0533892962.

The spelling of 72539568 in words is "seventy-two million, five hundred thirty-nine thousand, five hundred sixty-eight".