979939840 has 320 divisors, whose sum is σ = 2863745280. Its totient is φ = 317194240.

The previous prime is 979939819. The next prime is 979939861. The reversal of 979939840 is 48939979.

It is an interprime number because it is at equal distance from previous prime (979939819) and next prime (979939861).

It is a tau number, because it is divible by the number of its divisors (320).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11010516 + ... + 11010604.

It is an arithmetic number, because the mean of its divisors is an integer number (8949204).

Almost surely, 2^979939840 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 979939840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1431872640).

979939840 is an abundant number, since it is smaller than the sum of its proper divisors (1883805440).

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

979939840 is a wasteful number, since it uses less digits than its factorization.

979939840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 4408992, while the sum is 58.

The square root of 979939840 is about 31303.9907998964. The cubic root of 979939840 is about 993.2680627152.

The spelling of 979939840 in words is "nine hundred seventy-nine million, nine hundred thirty-nine thousand, eight hundred forty".