398099 has 8 divisors (see below), whose sum is σ = 434112. Its totient is φ = 362880.

The previous prime is 398087. The next prime is 398113. The reversal of 398099 is 990893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398099 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 398099.

It is not an unprimeable number, because it can be changed into a prime (398029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1334 + ... + 1604.

It is an arithmetic number, because the mean of its divisors is an integer number (54264).

2³⁹⁸⁰⁹⁹ is an apocalyptic number.

398099 is a deficient number, since it is larger than the sum of its proper divisors (36013).

398099 is a wasteful number, since it uses less digits than its factorization.

398099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 398099 is about 630.9508697197. The cubic root of 398099 is about 73.5637221773.

It can be divided in two parts, 39809 and 9, that multiplied together give a triangular number (358281 = T₈₄₆).

The spelling of 398099 in words is "three hundred ninety-eight thousand, ninety-nine".