978389900 has 36 divisors (see below), whose sum is σ = 2126499312. Its totient is φ = 390730560.

The previous prime is 978389851. The next prime is 978389941. The reversal of 978389900 is 9983879.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57809 + ... + 72791.

Almost surely, 2^978389900 is an apocalyptic number.

It is an amenable number.

978389900 is an abundant number, since it is smaller than the sum of its proper divisors (1148109412).

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

978389900 is a wasteful number, since it uses less digits than its factorization.

978389900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15650 (or 15643 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 53.

The square root of 978389900 is about 31279.2247346382. The cubic root of 978389900 is about 992.7441127696.

The spelling of 978389900 in words is "nine hundred seventy-eight million, three hundred eighty-nine thousand, nine hundred".