864790 has 16 divisors (see below), whose sum is σ = 1648512. Its totient is φ = 325504.

The previous prime is 864781. The next prime is 864793. The reversal of 864790 is 97468.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2374 + ... + 2713.

It is an arithmetic number, because the mean of its divisors is an integer number (103032).

2⁸⁶⁴⁷⁹⁰ is an apocalyptic number.

864790 is a deficient number, since it is larger than the sum of its proper divisors (783722).

864790 is a wasteful number, since it uses less digits than its factorization.

864790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5111.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 864790 is about 929.9408583346. The cubic root of 864790 is about 95.2730831369.

The spelling of 864790 in words is "eight hundred sixty-four thousand, seven hundred ninety".