398598431 has 8 divisors (see below), whose sum is σ = 496953984. Its totient is φ = 310596120.

The previous prime is 398598427. The next prime is 398598443. The reversal of 398598431 is 134895893.

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

It is a cyclic number.

It is not a de Polignac number, because 398598431 - 2² = 398598427 is a prime.

It is a super-2 number, since 2×398598431² = 317761418391323522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 398598431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398598481) 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, 2588225 + ... + 2588378.

It is an arithmetic number, because the mean of its divisors is an integer number (62119248).

Almost surely, 2^398598431 is an apocalyptic number.

398598431 is a deficient number, since it is larger than the sum of its proper divisors (98355553).

398598431 is a wasteful number, since it uses less digits than its factorization.

398598431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5176621.

The product of its digits is 933120, while the sum is 50.

The square root of 398598431 is about 19964.9300274256. The cubic root of 398598431 is about 735.9447219186.

The spelling of 398598431 in words is "three hundred ninety-eight million, five hundred ninety-eight thousand, four hundred thirty-one".