979912640 has 112 divisors (see below), whose sum is σ = 2823740352. Its totient is φ = 316194816.

The previous prime is 979912607. The next prime is 979912643. The reversal of 979912640 is 46219979.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (979912643) 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 15 ways as a sum of consecutive naturals, for example, 25214 + ... + 50946.

Almost surely, 2^979912640 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 979912640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1411870176).

979912640 is an abundant number, since it is smaller than the sum of its proper divisors (1843827712).

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

979912640 is a wasteful number, since it uses less digits than its factorization.

979912640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25774 (or 25764 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 979912640 is about 31303.5563474823. The cubic root of 979912640 is about 993.2588726472.

The spelling of 979912640 in words is "nine hundred seventy-nine million, nine hundred twelve thousand, six hundred forty".