866972 has 6 divisors (see below), whose sum is σ = 1517208. Its totient is φ = 433484.

The previous prime is 866969. The next prime is 867001. The reversal of 866972 is 279668.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108368 + ... + 108375.

It is an arithmetic number, because the mean of its divisors is an integer number (252868).

2⁸⁶⁶⁹⁷² is an apocalyptic number.

It is an amenable number.

866972 is a deficient number, since it is larger than the sum of its proper divisors (650236).

866972 is a wasteful number, since it uses less digits than its factorization.

866972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216747 (or 216745 counting only the distinct ones).

The product of its digits is 36288, while the sum is 38.

The square root of 866972 is about 931.1133121162. The cubic root of 866972 is about 95.3531454523.

The spelling of 866972 in words is "eight hundred sixty-six thousand, nine hundred seventy-two".