866372 has 12 divisors (see below), whose sum is σ = 1632876. Its totient is φ = 399840.

The previous prime is 866353. The next prime is 866389. The reversal of 866372 is 273668.

It can be written as a sum of positive squares in 2 ways, for example, as 264196 + 602176 = 514^2 + 776^2 .

It is an unprimeable number.

866372 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8279 + ... + 8382.

It is an arithmetic number, because the mean of its divisors is an integer number (136073).

2⁸⁶⁶³⁷² is an apocalyptic number.

It is an amenable number.

866372 is a deficient number, since it is larger than the sum of its proper divisors (766504).

866372 is a wasteful number, since it uses less digits than its factorization.

866372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16678 (or 16676 counting only the distinct ones).

The product of its digits is 12096, while the sum is 32.

The square root of 866372 is about 930.7910614096. The cubic root of 866372 is about 95.3311435536.

Subtracting from 866372 its reverse (273668), we obtain a cube (592704 = 84³).

The spelling of 866372 in words is "eight hundred sixty-six thousand, three hundred seventy-two".