864826 has 4 divisors (see below), whose sum is σ = 1297242. Its totient is φ = 432412.

The previous prime is 864817. The next prime is 864883. The reversal of 864826 is 628468.

864826 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 724201 + 140625 = 851^2 + 375^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 864791 and 864800.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 864826.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 216205 + ... + 216208.

2⁸⁶⁴⁸²⁶ is an apocalyptic number.

864826 is a deficient number, since it is larger than the sum of its proper divisors (432416).

864826 is a wasteful number, since it uses less digits than its factorization.

864826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432415.

The product of its digits is 18432, while the sum is 34.

The square root of 864826 is about 929.9602142027. The cubic root of 864826 is about 95.2744051470.

The spelling of 864826 in words is "eight hundred sixty-four thousand, eight hundred twenty-six".