216986732 has 24 divisors (see below), whose sum is σ = 392579712. Its totient is φ = 104832000.

The previous prime is 216986711. The next prime is 216986743. The reversal of 216986732 is 237689612.

216986732 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

216986732 is strictly pandigital in base 9.

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 7 ways as a sum of consecutive naturals, for example, 134732 + ... + 136332.

It is an arithmetic number, because the mean of its divisors is an integer number (16357488).

Almost surely, 2^216986732 is an apocalyptic number.

It is an amenable number.

216986732 is a deficient number, since it is larger than the sum of its proper divisors (175592980).

216986732 is a wasteful number, since it uses less digits than its factorization.

216986732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2729 (or 2727 counting only the distinct ones).

The product of its digits is 217728, while the sum is 44.

The square root of 216986732 is about 14730.4695105078. The cubic root of 216986732 is about 600.9122530285.

The spelling of 216986732 in words is "two hundred sixteen million, nine hundred eighty-six thousand, seven hundred thirty-two".