72439872 has 28 divisors (see below), whose sum is σ = 191664336. Its totient is φ = 24146560.

The previous prime is 72439847. The next prime is 72439877. The reversal of 72439872 is 27893427.

It is not an unprimeable number, because it can be changed into a prime (72439877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188454 + ... + 188837.

Almost surely, 2^72439872 is an apocalyptic number.

It is an amenable number.

72439872 is an abundant number, since it is smaller than the sum of its proper divisors (119224464).

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

72439872 is a wasteful number, since it uses less digits than its factorization.

72439872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377306 (or 377296 counting only the distinct ones).

The product of its digits is 169344, while the sum is 42.

The square root of 72439872 is about 8511.1616128470. The cubic root of 72439872 is about 416.8622402058.

The spelling of 72439872 in words is "seventy-two million, four hundred thirty-nine thousand, eight hundred seventy-two".