979237969920 has 448 divisors, whose sum is σ = 3978914307840. Its totient is φ = 223824052224.

The previous prime is 979237969909. The next prime is 979237969949. The reversal of 979237969920 is 29969732979.

It is a happy number.

979237969920 is a `hidden beast` number, since 97 + 92 + 379 + 69 + 9 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Smith number, since the sum of its digits (72) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (72).

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 31 ways as a sum of consecutive naturals, for example, 7678194 + ... + 7804686.

Almost surely, 2^979237969920 is an apocalyptic number.

979237969920 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 979237969920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1989457153920).

979237969920 is an abundant number, since it is smaller than the sum of its proper divisors (2999676337920).

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

979237969920 is a wasteful number, since it uses less digits than its factorization.

979237969920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126540 (or 126510 counting only the distinct ones).

The product of its (nonzero) digits is 208324872, while the sum is 72.

The spelling of 979237969920 in words is "nine hundred seventy-nine billion, two hundred thirty-seven million, nine hundred sixty-nine thousand, nine hundred twenty".