404890 has 16 divisors (see below), whose sum is σ = 767520. Its totient is φ = 153360.

The previous prime is 404851. The next prime is 404941. The reversal of 404890 is 98404.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 404890.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 876 + ... + 1255.

It is an arithmetic number, because the mean of its divisors is an integer number (47970).

2⁴⁰⁴⁸⁹⁰ is an apocalyptic number.

404890 is a deficient number, since it is larger than the sum of its proper divisors (362630).

404890 is a wasteful number, since it uses less digits than its factorization.

404890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2157.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 404890 is about 636.3096730366. The cubic root of 404890 is about 73.9796632696.

The spelling of 404890 in words is "four hundred four thousand, eight hundred ninety".