866492 has 24 divisors (see below), whose sum is σ = 1693440. Its totient is φ = 384560.

The previous prime is 866477. The next prime is 866513. The reversal of 866492 is 294668.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 866492.

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 in 7 ways as a sum of consecutive naturals, for example, 1859 + ... + 2277.

It is an arithmetic number, because the mean of its divisors is an integer number (70560).

2⁸⁶⁶⁴⁹² is an apocalyptic number.

It is an amenable number.

866492 is a deficient number, since it is larger than the sum of its proper divisors (826948).

866492 is a wasteful number, since it uses less digits than its factorization.

866492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481 (or 479 counting only the distinct ones).

The product of its digits is 20736, while the sum is 35.

The square root of 866492 is about 930.8555204757. The cubic root of 866492 is about 95.3355447458.

The spelling of 866492 in words is "eight hundred sixty-six thousand, four hundred ninety-two".