216630860 has 24 divisors (see below), whose sum is σ = 459433296. Its totient is φ = 85793600.

The previous prime is 216630857. The next prime is 216630923. The reversal of 216630860 is 68036612.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51602 + ... + 55641.

It is an arithmetic number, because the mean of its divisors is an integer number (19143054).

Almost surely, 2^216630860 is an apocalyptic number.

216630860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216630860 is an abundant number, since it is smaller than the sum of its proper divisors (242802436).

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

216630860 is a wasteful number, since it uses less digits than its factorization.

216630860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107353 (or 107351 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 216630860 is about 14718.3851016339. The cubic root of 216630860 is about 600.5835618715.

The spelling of 216630860 in words is "two hundred sixteen million, six hundred thirty thousand, eight hundred sixty".