72039400 has 24 divisors (see below), whose sum is σ = 167492070. Its totient is φ = 28815680.

The previous prime is 72039397. The next prime is 72039433. The reversal of 72039400 is 493027.

It can be written as a sum of positive squares in 3 ways, for example, as 46049796 + 25989604 = 6786^2 + 5098^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 179899 + ... + 180298.

Almost surely, 2^72039400 is an apocalyptic number.

It is an amenable number.

72039400 is an abundant number, since it is smaller than the sum of its proper divisors (95452670).

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

72039400 is a wasteful number, since it uses less digits than its factorization.

72039400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360213 (or 360204 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 72039400 is about 8487.6027239734. The cubic root of 72039400 is about 416.0926353122.

The spelling of 72039400 in words is "seventy-two million, thirty-nine thousand, four hundred".