72208404 has 18 divisors (see below), whose sum is σ = 182526890. Its totient is φ = 24069456.

The previous prime is 72208397. The next prime is 72208427. The reversal of 72208404 is 40480227.

It can be written as a sum of positive squares in only one way, i.e., 71571600 + 636804 = 8460^2 + 798^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

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, 1002859 + ... + 1002930.

Almost surely, 2^72208404 is an apocalyptic number.

It is an amenable number.

72208404 is an abundant number, since it is smaller than the sum of its proper divisors (110318486).

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

72208404 is a wasteful number, since it uses less digits than its factorization.

72208404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2005799 (or 2005794 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 72208404 is about 8497.5528241959. The cubic root of 72208404 is about 416.4177648023.

The spelling of 72208404 in words is "seventy-two million, two hundred eight thousand, four hundred four".