8561872 has 20 divisors (see below), whose sum is σ = 18097056. Its totient is φ = 3891680.

The previous prime is 8561869. The next prime is 8561887. The reversal of 8561872 is 2781658.

It is an alternating number because its digits alternate between even and odd.

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, 24148 + ... + 24499.

Almost surely, 2^8561872 is an apocalyptic number.

It is an amenable number.

8561872 is an abundant number, since it is smaller than the sum of its proper divisors (9535184).

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

8561872 is a wasteful number, since it uses less digits than its factorization.

8561872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48666 (or 48660 counting only the distinct ones).

The product of its digits is 26880, while the sum is 37.

The square root of 8561872 is about 2926.0676683905. The cubic root of 8561872 is about 204.5767352505.

The spelling of 8561872 in words is "eight million, five hundred sixty-one thousand, eight hundred seventy-two".