3218657868 has 36 divisors (see below), whose sum is σ = 8194597320. Its totient is φ = 1065165696.

The previous prime is 3218657851. The next prime is 3218657921. The reversal of 3218657868 is 8687568123.

3218657868 is a `hidden beast` number, since 3 + 2 + 1 + 8 + 6 + 578 + 68 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 316605 + ... + 326612.

Almost surely, 2^3218657868 is an apocalyptic number.

It is an amenable number.

3218657868 is an abundant number, since it is smaller than the sum of its proper divisors (4975939452).

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

3218657868 is a wasteful number, since it uses less digits than its factorization.

3218657868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643366 (or 643361 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 54.

The square root of 3218657868 is about 56733.2166195431. The cubic root of 3218657868 is about 1476.4710583641.

The spelling of 3218657868 in words is "three billion, two hundred eighteen million, six hundred fifty-seven thousand, eight hundred sixty-eight".