72186868 has 24 divisors (see below), whose sum is σ = 136328192. Its totient is φ = 33247584.

The previous prime is 72186859. The next prime is 72186883. The reversal of 72186868 is 86868127.

72186868 = 317² + 318² + ... + 628².

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30421 + ... + 32707.

Almost surely, 2^72186868 is an apocalyptic number.

It is an amenable number.

72186868 is a deficient number, since it is larger than the sum of its proper divisors (64141324).

72186868 is a wasteful number, since it uses less digits than its factorization.

72186868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2911 (or 2909 counting only the distinct ones).

The product of its digits is 258048, while the sum is 46.

The square root of 72186868 is about 8496.2855413410. The cubic root of 72186868 is about 416.3763621206.

The spelling of 72186868 in words is "seventy-two million, one hundred eighty-six thousand, eight hundred sixty-eight".