8720905872 has 80 divisors (see below), whose sum is σ = 26100214400. Its totient is φ = 2457547776.

The previous prime is 8720905849. The next prime is 8720905873. The reversal of 8720905872 is 2785090278.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (8720905873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153247 + ... + 202302.

It is an arithmetic number, because the mean of its divisors is an integer number (326252680).

Almost surely, 2^8720905872 is an apocalyptic number.

It is an amenable number.

8720905872 is an abundant number, since it is smaller than the sum of its proper divisors (17379308528).

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

8720905872 is a wasteful number, since it uses less digits than its factorization.

8720905872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355640 (or 355634 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 48.

The square root of 8720905872 is about 93385.7905251115. The cubic root of 8720905872 is about 2058.3562052427.

The spelling of 8720905872 in words is "eight billion, seven hundred twenty million, nine hundred five thousand, eight hundred seventy-two".