864396 has 36 divisors (see below), whose sum is σ = 2354352. Its totient is φ = 265824.

The previous prime is 864379. The next prime is 864407. The reversal of 864396 is 693468.

864396 is a `hidden beast` number, since 8 + 643 + 9 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×864396³ = 1937579363331513408, which contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 864396.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 456 + ... + 1391.

2⁸⁶⁴³⁹⁶ is an apocalyptic number.

It is an amenable number.

864396 is an abundant number, since it is smaller than the sum of its proper divisors (1489956).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

864396 is a wasteful number, since it uses less digits than its factorization.

864396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1870 (or 1865 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 864396 is about 929.7289927715. The cubic root of 864396 is about 95.2586120719.

The spelling of 864396 in words is "eight hundred sixty-four thousand, three hundred ninety-six".