72539452 has 12 divisors (see below), whose sum is σ = 129896536. Its totient is φ = 35426160.

The previous prime is 72539449. The next prime is 72539483. The reversal of 72539452 is 25493527.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210699 + ... + 211042.

Almost surely, 2^72539452 is an apocalyptic number.

It is an amenable number.

72539452 is a deficient number, since it is larger than the sum of its proper divisors (57357084).

72539452 is a wasteful number, since it uses less digits than its factorization.

72539452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421788 (or 421786 counting only the distinct ones).

The product of its digits is 75600, while the sum is 37.

The square root of 72539452 is about 8517.0095690917. The cubic root of 72539452 is about 417.0531669889.

The spelling of 72539452 in words is "seventy-two million, five hundred thirty-nine thousand, four hundred fifty-two".