8720974836 has 120 divisors (see below), whose sum is σ = 26136224576. Its totient is φ = 2483965440.

The previous prime is 8720974813. The next prime is 8720974841. The reversal of 8720974836 is 6384790278.

8720974836 is a `hidden beast` number, since 8 + 72 + 0 + 97 + 483 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 744900 + ... + 756516.

Almost surely, 2^8720974836 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 8720974836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13068112288).

8720974836 is an abundant number, since it is smaller than the sum of its proper divisors (17415249740).

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

8720974836 is a wasteful number, since it uses less digits than its factorization.

8720974836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11971 (or 11960 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The square root of 8720974836 is about 93386.1597668520. The cubic root of 8720974836 is about 2058.3616309827.

The spelling of 8720974836 in words is "eight billion, seven hundred twenty million, nine hundred seventy-four thousand, eight hundred thirty-six".