866572 has 12 divisors (see below), whose sum is σ = 1733200. Its totient is φ = 371376.

The previous prime is 866519. The next prime is 866573. The reversal of 866572 is 275668.

866572 is an admirable number.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15447 + ... + 15502.

2⁸⁶⁶⁵⁷² is an apocalyptic number.

It is an amenable number.

866572 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.

866572 is a wasteful number, since it uses less digits than its factorization.

866572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30960 (or 30958 counting only the distinct ones).

The product of its digits is 20160, while the sum is 34.

The square root of 866572 is about 930.8984907067. The cubic root of 866572 is about 95.3384786482.

The spelling of 866572 in words is "eight hundred sixty-six thousand, five hundred seventy-two".