978800964 has 12 divisors (see below), whose sum is σ = 2283868944. Its totient is φ = 326266984.

The previous prime is 978800951. The next prime is 978800971. The reversal of 978800964 is 469008879.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40783362 + ... + 40783385.

It is an arithmetic number, because the mean of its divisors is an integer number (190322412).

Almost surely, 2^978800964 is an apocalyptic number.

It is an amenable number.

978800964 is an abundant number, since it is smaller than the sum of its proper divisors (1305067980).

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

978800964 is a wasteful number, since it uses less digits than its factorization.

978800964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81566754 (or 81566752 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 978800964 is about 31285.7949235751. The cubic root of 978800964 is about 992.8831249120.

The spelling of 978800964 in words is "nine hundred seventy-eight million, eight hundred thousand, nine hundred sixty-four".