398243599 has 16 divisors (see below), whose sum is σ = 435635200. Its totient is φ = 364017888.

The previous prime is 398243561. The next prime is 398243603. The reversal of 398243599 is 995342893.

It is not a de Polignac number, because 398243599 - 2²⁵ = 364689167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398243539) 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, 238642 + ... + 240304.

It is an arithmetic number, because the mean of its divisors is an integer number (27227200).

Almost surely, 2^398243599 is an apocalyptic number.

398243599 is a deficient number, since it is larger than the sum of its proper divisors (37391601).

398243599 is a wasteful number, since it uses less digits than its factorization.

398243599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1811 (or 1785 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 52.

The square root of 398243599 is about 19956.0416666232. The cubic root of 398243599 is about 735.7262779547.

The spelling of 398243599 in words is "three hundred ninety-eight million, two hundred forty-three thousand, five hundred ninety-nine".