216683964 has 48 divisors (see below), whose sum is σ = 642028800. Its totient is φ = 61909488.

The previous prime is 216683947. The next prime is 216683983. The reversal of 216683964 is 469386612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142554 + ... + 144065.

It is an arithmetic number, because the mean of its divisors is an integer number (13375600).

Almost surely, 2^216683964 is an apocalyptic number.

It is an amenable number.

216683964 is an abundant number, since it is smaller than the sum of its proper divisors (425344836).

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

216683964 is a wasteful number, since it uses less digits than its factorization.

216683964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286639 (or 286631 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 216683964 is about 14720.1889933520. The cubic root of 216683964 is about 600.6326327253.

The spelling of 216683964 in words is "two hundred sixteen million, six hundred eighty-three thousand, nine hundred sixty-four".