904406 has 8 divisors (see below), whose sum is σ = 1415664. Its totient is φ = 432520.

The previous prime is 904399. The next prime is 904441. The reversal of 904406 is 604409.

904406 = 474² + 475² + ... + 477².

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

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

904406 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 3 ways as a sum of consecutive naturals, for example, 9785 + ... + 9876.

It is an arithmetic number, because the mean of its divisors is an integer number (176958).

2⁹⁰⁴⁴⁰⁶ is an apocalyptic number.

904406 is a deficient number, since it is larger than the sum of its proper divisors (511258).

904406 is a wasteful number, since it uses less digits than its factorization.

904406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19686.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 904406 is about 951.0026288081. The cubic root of 904406 is about 96.7062356175.

The spelling of 904406 in words is "nine hundred four thousand, four hundred six".