8720042160 has 80 divisors (see below), whose sum is σ = 27087552000. Its totient is φ = 2320577280.

The previous prime is 8720042159. The next prime is 8720042251. The reversal of 8720042160 is 612400278.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 80841 + ... + 154839.

It is an arithmetic number, because the mean of its divisors is an integer number (338594400).

Almost surely, 2^8720042160 is an apocalyptic number.

8720042160 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8720042160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13543776000).

8720042160 is an abundant number, since it is smaller than the sum of its proper divisors (18367509840).

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

8720042160 is a wasteful number, since it uses less digits than its factorization.

8720042160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74506 (or 74500 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 8720042160 is about 93381.1659811549. The cubic root of 8720042160 is about 2058.2882503125.

The spelling of 8720042160 in words is "eight billion, seven hundred twenty million, forty-two thousand, one hundred sixty".