216708942 has 16 divisors (see below), whose sum is σ = 433608912. Its totient is φ = 72204480.

The previous prime is 216708937. The next prime is 216708991. The reversal of 216708942 is 249807612.

It is a self number, because there is not a number n which added to its sum of digits gives 216708942.

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 7 ways as a sum of consecutive naturals, for example, 9858 + ... + 23034.

It is an arithmetic number, because the mean of its divisors is an integer number (27100557).

Almost surely, 2^216708942 is an apocalyptic number.

216708942 is an abundant number, since it is smaller than the sum of its proper divisors (216899970).

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

216708942 is a wasteful number, since it uses less digits than its factorization.

216708942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15923.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 216708942 is about 14721.0373955099. The cubic root of 216708942 is about 600.6557109220.

The spelling of 216708942 in words is "two hundred sixteen million, seven hundred eight thousand, nine hundred forty-two".