904490 has 16 divisors (see below), whose sum is σ = 1641600. Its totient is φ = 358800.

The previous prime is 904489. The next prime is 904499. The reversal of 904490 is 94409.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 904490.

It is not an unprimeable number, because it can be changed into a prime (904499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1211 + ... + 1809.

It is an arithmetic number, because the mean of its divisors is an integer number (102600).

2⁹⁰⁴⁴⁹⁰ is an apocalyptic number.

904490 is a deficient number, since it is larger than the sum of its proper divisors (737110).

904490 is a wasteful number, since it uses less digits than its factorization.

904490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 904490 is about 951.0467916985. The cubic root of 904490 is about 96.7092295060.

Adding to 904490 its reverse (94409), we get a palindrome (998899).

The spelling of 904490 in words is "nine hundred four thousand, four hundred ninety".