216866872 has 16 divisors (see below), whose sum is σ = 420647400. Its totient is φ = 104694240.

The previous prime is 216866869. The next prime is 216866891. The reversal of 216866872 is 278668612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 467154 + ... + 467617.

Almost surely, 2^216866872 is an apocalyptic number.

It is an amenable number.

216866872 is a deficient number, since it is larger than the sum of its proper divisors (203780528).

216866872 is a wasteful number, since it uses less digits than its factorization.

216866872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934806 (or 934802 counting only the distinct ones).

The product of its digits is 387072, while the sum is 46.

The square root of 216866872 is about 14726.4005106475. The cubic root of 216866872 is about 600.8015878771.

The spelling of 216866872 in words is "two hundred sixteen million, eight hundred sixty-six thousand, eight hundred seventy-two".