398231431 has 12 divisors (see below), whose sum is σ = 453920520. Its totient is φ = 348248160.

The previous prime is 398231419. The next prime is 398231447. The reversal of 398231431 is 134132893.

It is not a de Polignac number, because 398231431 - 2⁹ = 398230919 is a prime.

It is a super-2 number, since 2×398231431² = 317176545272615522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398231461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58800 + ... + 65221.

It is an arithmetic number, because the mean of its divisors is an integer number (37826710).

Almost surely, 2^398231431 is an apocalyptic number.

398231431 is a deficient number, since it is larger than the sum of its proper divisors (55689089).

398231431 is a wasteful number, since it uses less digits than its factorization.

398231431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124066 (or 124053 counting only the distinct ones).

The product of its digits is 15552, while the sum is 34.

The square root of 398231431 is about 19955.7367942153. The cubic root of 398231431 is about 735.7187847114.

The spelling of 398231431 in words is "three hundred ninety-eight million, two hundred thirty-one thousand, four hundred thirty-one".