856650980 has 24 divisors (see below), whose sum is σ = 1805380920. Its totient is φ = 341438720.

The previous prime is 856650959. The next prime is 856651009. The reversal of 856650980 is 89056658.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 98089216 + 758561764 = 9904^2 + 27542^2 .

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, 70595 + ... + 81834.

It is an arithmetic number, because the mean of its divisors is an integer number (75224205).

Almost surely, 2^856650980 is an apocalyptic number.

It is an amenable number.

856650980 is an abundant number, since it is smaller than the sum of its proper divisors (948729940).

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

856650980 is a wasteful number, since it uses less digits than its factorization.

856650980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152719 (or 152717 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 47.

The square root of 856650980 is about 29268.6005815106. The cubic root of 856650980 is about 949.7325119490.

The spelling of 856650980 in words is "eight hundred fifty-six million, six hundred fifty thousand, nine hundred eighty".