8631216 has 60 divisors (see below), whose sum is σ = 26356200. Its totient is φ = 2615040.

The previous prime is 8631199. The next prime is 8631229. The reversal of 8631216 is 6121368.

8631216 is a `hidden beast` number, since 8 + 631 + 21 + 6 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 8631216.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1141 + ... + 4308.

It is an arithmetic number, because the mean of its divisors is an integer number (439270).

Almost surely, 2^8631216 is an apocalyptic number.

It is an amenable number.

8631216 is an abundant number, since it is smaller than the sum of its proper divisors (17724984).

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

8631216 is a wasteful number, since it uses less digits than its factorization.

8631216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5474 (or 5465 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 8631216 is about 2937.8931226306. The cubic root of 8631216 is about 205.1275510001.

The spelling of 8631216 in words is "eight million, six hundred thirty-one thousand, two hundred sixteen".