8671572 has 72 divisors (see below), whose sum is σ = 26988416. Its totient is φ = 2286144.

The previous prime is 8671549. The next prime is 8671573. The reversal of 8671572 is 2751768.

8671572 is a `hidden beast` number, since 86 + 7 + 1 + 572 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8671573) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1953 + ... + 4599.

Almost surely, 2^8671572 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8671572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13494208).

8671572 is an abundant number, since it is smaller than the sum of its proper divisors (18316844).

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

8671572 is a wasteful number, since it uses less digits than its factorization.

8671572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2677 (or 2672 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 8671572 is about 2944.7533003632. The cubic root of 8671572 is about 205.4467512593.

The spelling of 8671572 in words is "eight million, six hundred seventy-one thousand, five hundred seventy-two".