8720172244 has 12 divisors (see below), whose sum is σ = 17440344544. Its totient is φ = 3737216664.

The previous prime is 8720172179. The next prime is 8720172299. The reversal of 8720172244 is 4422710278.

8720172244 is an admirable number.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155717334 + ... + 155717389.

Almost surely, 2^8720172244 is an apocalyptic number.

It is an amenable number.

8720172244 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

8720172244 is a wasteful number, since it uses less digits than its factorization.

8720172244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311434734 (or 311434732 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 37.

The square root of 8720172244 is about 93381.8625001665. The cubic root of 8720172244 is about 2058.2984853179.

The spelling of 8720172244 in words is "eight billion, seven hundred twenty million, one hundred seventy-two thousand, two hundred forty-four".