904690 has 8 divisors (see below), whose sum is σ = 1628460. Its totient is φ = 361872.

The previous prime is 904681. The next prime is 904693. The reversal of 904690 is 96409.

It can be written as a sum of positive squares in 2 ways, for example, as 904401 + 289 = 951^2 + 17^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×904690² = 1636927992200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (904693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45225 + ... + 45244.

2⁹⁰⁴⁶⁹⁰ is an apocalyptic number.

904690 is a deficient number, since it is larger than the sum of its proper divisors (723770).

904690 is a wasteful number, since it uses less digits than its factorization.

904690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90476.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 904690 is about 951.1519331842. The cubic root of 904690 is about 96.7163570661.

The spelling of 904690 in words is "nine hundred four thousand, six hundred ninety".