216960964 has 24 divisors (see below), whose sum is σ = 419878368. Its totient is φ = 97266240.

The previous prime is 216960949. The next prime is 216961039. The reversal of 216960964 is 469069612.

It is a happy number.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 216960964.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30562 + ... + 36985.

It is an arithmetic number, because the mean of its divisors is an integer number (17494932).

Almost surely, 2^216960964 is an apocalyptic number.

It is an amenable number.

216960964 is a deficient number, since it is larger than the sum of its proper divisors (202917404).

216960964 is a wasteful number, since it uses less digits than its factorization.

216960964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67635 (or 67633 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 216960964 is about 14729.5948348894. The cubic root of 216960964 is about 600.8884652147. Note that the first 3 decimals are identical.

The spelling of 216960964 in words is "two hundred sixteen million, nine hundred sixty thousand, nine hundred sixty-four".