864828 has 18 divisors (see below), whose sum is σ = 2186184. Its totient is φ = 288264.

The previous prime is 864817. The next prime is 864883. The reversal of 864828 is 828468.

864828 is a `hidden beast` number, since 8 + 648 + 2 + 8 = 666.

864828 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 24023 = 864828 / (8 + 6 + 4 + 8 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 864792 and 864801.

It is a congruent number.

It is an unprimeable number.

864828 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11976 + ... + 12047.

2⁸⁶⁴⁸²⁸ is an apocalyptic number.

It is an amenable number.

864828 is an abundant number, since it is smaller than the sum of its proper divisors (1321356).

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

864828 is a wasteful number, since it uses less digits than its factorization.

864828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24033 (or 24028 counting only the distinct ones).

The product of its digits is 24576, while the sum is 36.

The square root of 864828 is about 929.9612895169. The cubic root of 864828 is about 95.2744785909.

The spelling of 864828 in words is "eight hundred sixty-four thousand, eight hundred twenty-eight".