216862684 has 12 divisors (see below), whose sum is σ = 384855408. Its totient is φ = 106904000.

The previous prime is 216862673. The next prime is 216862691. The reversal of 216862684 is 486268612.

It is a self number, because there is not a number n which added to its sum of digits gives 216862684.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381517 + ... + 382084.

It is an arithmetic number, because the mean of its divisors is an integer number (32071284).

Almost surely, 2^216862684 is an apocalyptic number.

It is an amenable number.

216862684 is a deficient number, since it is larger than the sum of its proper divisors (167992724).

216862684 is a wasteful number, since it uses less digits than its factorization.

216862684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763676 (or 763674 counting only the distinct ones).

The product of its digits is 221184, while the sum is 43.

The square root of 216862684 is about 14726.2583163545. The cubic root of 216862684 is about 600.7977204150.

The spelling of 216862684 in words is "two hundred sixteen million, eight hundred sixty-two thousand, six hundred eighty-four".