979857920 has 80 divisors (see below), whose sum is σ = 2425344768. Its totient is φ = 379269120.

The previous prime is 979857919. The next prime is 979857929. The reversal of 979857920 is 29758979.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (979857929) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 73187 + ... + 85533.

Almost surely, 2^979857920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 979857920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1212672384).

979857920 is an abundant number, since it is smaller than the sum of its proper divisors (1445486848).

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

979857920 is a wasteful number, since it uses less digits than its factorization.

979857920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12401 (or 12385 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 56.

The square root of 979857920 is about 31302.6823131820. The cubic root of 979857920 is about 993.2403838776.

The spelling of 979857920 in words is "nine hundred seventy-nine million, eight hundred fifty-seven thousand, nine hundred twenty".