398879418 has 32 divisors (see below), whose sum is σ = 941137920. Its totient is φ = 110288880.

The previous prime is 398879389. The next prime is 398879479. The reversal of 398879418 is 814978893.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151878 + ... + 154481.

It is an arithmetic number, because the mean of its divisors is an integer number (29410560).

Almost surely, 2^398879418 is an apocalyptic number.

398879418 is an abundant number, since it is smaller than the sum of its proper divisors (542258502).

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

398879418 is a wasteful number, since it uses less digits than its factorization.

398879418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306402.

The product of its digits is 3483648, while the sum is 57.

The square root of 398879418 is about 19971.9658020937. The cubic root of 398879418 is about 736.1176129880.

The spelling of 398879418 in words is "three hundred ninety-eight million, eight hundred seventy-nine thousand, four hundred eighteen".