398998115 has 16 divisors (see below), whose sum is σ = 483585120. Its totient is φ = 316020480.

The previous prime is 398998099. The next prime is 398998123. The reversal of 398998115 is 511899893.

It is not a de Polignac number, because 398998115 - 2⁴ = 398998099 is a prime.

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, 423545 + ... + 424485.

It is an arithmetic number, because the mean of its divisors is an integer number (30224070).

Almost surely, 2^398998115 is an apocalyptic number.

398998115 is a deficient number, since it is larger than the sum of its proper divisors (84587005).

398998115 is a wasteful number, since it uses less digits than its factorization.

398998115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1702.

The product of its digits is 699840, while the sum is 53.

The square root of 398998115 is about 19974.9371713655. The cubic root of 398998115 is about 736.1906227607.

The spelling of 398998115 in words is "three hundred ninety-eight million, nine hundred ninety-eight thousand, one hundred fifteen".