398412879 has 16 divisors (see below), whose sum is σ = 545541120. Its totient is φ = 258541920.

The previous prime is 398412871. The next prime is 398412893. The reversal of 398412879 is 978214893.

It is not a de Polignac number, because 398412879 - 2³ = 398412871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398412871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4989 + ... + 28665.

It is an arithmetic number, because the mean of its divisors is an integer number (34096320).

Almost surely, 2^398412879 is an apocalyptic number.

398412879 is a deficient number, since it is larger than the sum of its proper divisors (147128241).

398412879 is a wasteful number, since it uses less digits than its factorization.

398412879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23830.

The product of its digits is 870912, while the sum is 51.

The square root of 398412879 is about 19960.2825380805. The cubic root of 398412879 is about 735.8305073781.

The spelling of 398412879 in words is "three hundred ninety-eight million, four hundred twelve thousand, eight hundred seventy-nine".