8720023656 has 64 divisors (see below), whose sum is σ = 23098063680. Its totient is φ = 2733839360.

The previous prime is 8720023619. The next prime is 8720023661. The reversal of 8720023656 is 6563200278.

It is a super-2 number, since 2×8720023656² (a number of 21 digits) contains 22 as substring.

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, 673726 + ... + 686546.

It is an arithmetic number, because the mean of its divisors is an integer number (360907245).

Almost surely, 2^8720023656 is an apocalyptic number.

It is an amenable number.

8720023656 is an abundant number, since it is smaller than the sum of its proper divisors (14378040024).

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

8720023656 is a wasteful number, since it uses less digits than its factorization.

8720023656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14514 (or 14510 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 8720023656 is about 93381.0669033075. The cubic root of 8720023656 is about 2058.2867944100.

The spelling of 8720023656 in words is "eight billion, seven hundred twenty million, twenty-three thousand, six hundred fifty-six".