404198990 has 24 divisors (see below), whose sum is σ = 787832568. Its totient is φ = 149242080.

The previous prime is 404198983. The next prime is 404198999. The reversal of 404198990 is 99891404.

404198990 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404198999) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117896 + ... + 121275.

It is an arithmetic number, because the mean of its divisors is an integer number (32826357).

Almost surely, 2^404198990 is an apocalyptic number.

404198990 is a deficient number, since it is larger than the sum of its proper divisors (383633578).

404198990 is a wasteful number, since it uses less digits than its factorization.

404198990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239204 (or 239191 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 404198990 is about 20104.7006941163. The cubic root of 404198990 is about 739.3755323427.

The spelling of 404198990 in words is "four hundred four million, one hundred ninety-eight thousand, nine hundred ninety".