398911854 has 32 divisors (see below), whose sum is σ = 871163136. Its totient is φ = 120769920.

The previous prime is 398911841. The next prime is 398911913. The reversal of 398911854 is 458119893.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93414 + ... + 97590.

It is an arithmetic number, because the mean of its divisors is an integer number (27223848).

Almost surely, 2^398911854 is an apocalyptic number.

398911854 is an abundant number, since it is smaller than the sum of its proper divisors (472251282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

398911854 is a wasteful number, since it uses less digits than its factorization.

398911854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5640.

The product of its digits is 311040, while the sum is 48.

The square root of 398911854 is about 19972.7778238281. Note that the first 3 decimals coincide. The cubic root of 398911854 is about 736.1375656042.

The spelling of 398911854 in words is "three hundred ninety-eight million, nine hundred eleven thousand, eight hundred fifty-four".