853804 has 12 divisors (see below), whose sum is σ = 1707664. Its totient is φ = 365904.

The previous prime is 853799. The next prime is 853807. The reversal of 853804 is 408358.

853804 is an admirable number.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 30493 = 853804 / (8 + 5 + 3 + 8 + 0 + 4).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (853807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15219 + ... + 15274.

2⁸⁵³⁸⁰⁴ is an apocalyptic number.

It is an amenable number.

853804 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

853804 is a wasteful number, since it uses less digits than its factorization.

853804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30504 (or 30502 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 853804 is about 924.0151513909. The cubic root of 853804 is about 94.8679235720.

Subtracting from 853804 its sum of digits (28), we obtain a square (853776 = 924²).

The spelling of 853804 in words is "eight hundred fifty-three thousand, eight hundred four".