398238975 has 36 divisors (see below), whose sum is σ = 716579136. Its totient is φ = 211415040.

The previous prime is 398238961. The next prime is 398238983. The reversal of 398238975 is 579832893.

It is a happy number.

It is not a de Polignac number, because 398238975 - 2⁴ = 398238959 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 46207 + ... + 54143.

It is an arithmetic number, because the mean of its divisors is an integer number (19904976).

Almost surely, 2^398238975 is an apocalyptic number.

398238975 is a deficient number, since it is larger than the sum of its proper divisors (318340161).

398238975 is a wasteful number, since it uses less digits than its factorization.

398238975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8176 (or 8168 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 398238975 is about 19955.9258116480. The cubic root of 398238975 is about 735.7234304417.

The spelling of 398238975 in words is "three hundred ninety-eight million, two hundred thirty-eight thousand, nine hundred seventy-five".