431998 has 16 divisors (see below), whose sum is σ = 754560. Its totient is φ = 181656.

The previous prime is 431993. The next prime is 432001. The reversal of 431998 is 899134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 565 + ... + 1087.

It is an arithmetic number, because the mean of its divisors is an integer number (47160).

2⁴³¹⁹⁹⁸ is an apocalyptic number.

431998 is a deficient number, since it is larger than the sum of its proper divisors (322562).

431998 is a wasteful number, since it uses less digits than its factorization.

431998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591.

The product of its digits is 7776, while the sum is 34.

The square root of 431998 is about 657.2655475529. The cubic root of 431998 is about 75.5951463342.

The spelling of 431998 in words is "four hundred thirty-one thousand, nine hundred ninety-eight".