72539532 has 54 divisors (see below), whose sum is σ = 198570372. Its totient is φ = 22317984.

The previous prime is 72539521. The next prime is 72539543. The reversal of 72539532 is 23593527.

72539532 is a `hidden beast` number, since 72 + 53 + 9 + 532 = 666.

It is an interprime number because it is at equal distance from previous prime (72539521) and next prime (72539543).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 123 + ... + 12045.

Almost surely, 2^72539532 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72539532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99285186).

72539532 is an abundant number, since it is smaller than the sum of its proper divisors (126030840).

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

72539532 is a wasteful number, since it uses less digits than its factorization.

72539532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11959 (or 11941 counting only the distinct ones).

The product of its digits is 56700, while the sum is 36.

The square root of 72539532 is about 8517.0142655745. The cubic root of 72539532 is about 417.0533203043.

The spelling of 72539532 in words is "seventy-two million, five hundred thirty-nine thousand, five hundred thirty-two".