72394539 has 16 divisors (see below), whose sum is σ = 110899200. Its totient is φ = 41149440.

The previous prime is 72394537. The next prime is 72394559. The reversal of 72394539 is 93549327.

It is not a de Polignac number, because 72394539 - 2¹ = 72394537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72394539.

It is not an unprimeable number, because it can be changed into a prime (72394537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5014 + ... + 13035.

It is an arithmetic number, because the mean of its divisors is an integer number (6931200).

Almost surely, 2^72394539 is an apocalyptic number.

72394539 is a deficient number, since it is larger than the sum of its proper divisors (38504661).

72394539 is a wasteful number, since it uses less digits than its factorization.

72394539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18250.

The product of its digits is 204120, while the sum is 42.

The square root of 72394539 is about 8508.4980460714. The cubic root of 72394539 is about 416.7752643510.

It can be divided in two parts, 723945 and 39, that multiplied together give a triangular number (28233855 = T₇₅₁₄).

The spelling of 72394539 in words is "seventy-two million, three hundred ninety-four thousand, five hundred thirty-nine".