979979520 has 288 divisors, whose sum is σ = 3432546432. Its totient is φ = 236814336.

The previous prime is 979979519. The next prime is 979979527. The reversal of 979979520 is 25979979.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (979979527) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3344494 + ... + 3344786.

It is an arithmetic number, because the mean of its divisors is an integer number (11918564).

Almost surely, 2^979979520 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 979979520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1716273216).

979979520 is an abundant number, since it is smaller than the sum of its proper divisors (2452566912).

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

979979520 is a wasteful number, since it uses less digits than its factorization.

979979520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397 (or 383 counting only the distinct ones).

The product of its (nonzero) digits is 3214890, while the sum is 57.

The square root of 979979520 is about 31304.6245784868. The cubic root of 979979520 is about 993.2814690977.

The spelling of 979979520 in words is "nine hundred seventy-nine million, nine hundred seventy-nine thousand, five hundred twenty".