804990 has 16 divisors (see below), whose sum is σ = 1932048. Its totient is φ = 214656.

The previous prime is 804989. The next prime is 804997. The reversal of 804990 is 99408.

804990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 26833 = 804990 / (8 + 0 + 4 + 9 + 9 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (804997) 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, 13387 + ... + 13446.

It is an arithmetic number, because the mean of its divisors is an integer number (120753).

2⁸⁰⁴⁹⁹⁰ is an apocalyptic number.

804990 is an abundant number, since it is smaller than the sum of its proper divisors (1127058).

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

804990 is a wasteful number, since it uses less digits than its factorization.

804990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26843.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 804990 is about 897.2123494469. The cubic root of 804990 is about 93.0243894872.

The spelling of 804990 in words is "eight hundred four thousand, nine hundred ninety".