398281431 has 16 divisors (see below), whose sum is σ = 557005824. Its totient is φ = 252844704.

The previous prime is 398281427. The next prime is 398281451. The reversal of 398281431 is 134182893.

It is not a de Polignac number, because 398281431 - 2² = 398281427 is a prime.

It is a super-2 number, since 2×398281431² = 317256196558815522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 398281431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398281451) 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, 32955 + ... + 43388.

It is an arithmetic number, because the mean of its divisors is an integer number (34812864).

Almost surely, 2^398281431 is an apocalyptic number.

398281431 is a deficient number, since it is larger than the sum of its proper divisors (158724393).

398281431 is a wasteful number, since it uses less digits than its factorization.

398281431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76430.

The product of its digits is 41472, while the sum is 39.

The square root of 398281431 is about 19956.9895274813. The cubic root of 398281431 is about 735.7495745126.

The spelling of 398281431 in words is "three hundred ninety-eight million, two hundred eighty-one thousand, four hundred thirty-one".