8640980 has 24 divisors (see below), whose sum is σ = 18638088. Its totient is φ = 3362688.

The previous prime is 8640977. The next prime is 8641007. The reversal of 8640980 is 890468.

8640980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3984016 + 4656964 = 1996^2 + 2158^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 8640980.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5099 + ... + 6578.

It is an arithmetic number, because the mean of its divisors is an integer number (776587).

Almost surely, 2^8640980 is an apocalyptic number.

It is an amenable number.

8640980 is an abundant number, since it is smaller than the sum of its proper divisors (9997108).

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

8640980 is a wasteful number, since it uses less digits than its factorization.

8640980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11723 (or 11721 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 8640980 is about 2939.5543879983. The cubic root of 8640980 is about 205.2048715321.

The spelling of 8640980 in words is "eight million, six hundred forty thousand, nine hundred eighty".