979812636 has 48 divisors (see below), whose sum is σ = 2504089728. Its totient is φ = 295720000.

The previous prime is 979812607. The next prime is 979812649. The reversal of 979812636 is 636218979.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18346 + ... + 47918.

It is an arithmetic number, because the mean of its divisors is an integer number (52168536).

Almost surely, 2^979812636 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 979812636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1252044864).

979812636 is an abundant number, since it is smaller than the sum of its proper divisors (1524277092).

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

979812636 is a wasteful number, since it uses less digits than its factorization.

979812636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29842 (or 29840 counting only the distinct ones).

The product of its digits is 979776, while the sum is 51.

The square root of 979812636 is about 31301.9589802300. The cubic root of 979812636 is about 993.2250828190.

The spelling of 979812636 in words is "nine hundred seventy-nine million, eight hundred twelve thousand, six hundred thirty-six".