231398 has 16 divisors (see below), whose sum is σ = 369360. Its totient is φ = 108576.

The previous prime is 231379. The next prime is 231409. The reversal of 231398 is 893132.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 231398.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3893 + ... + 3951.

It is an arithmetic number, because the mean of its divisors is an integer number (23085).

2²³¹³⁹⁸ is an apocalyptic number.

231398 is a deficient number, since it is larger than the sum of its proper divisors (137962).

231398 is a wasteful number, since it uses less digits than its factorization.

231398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151.

The product of its digits is 1296, while the sum is 26.

The square root of 231398 is about 481.0384600009. The cubic root of 231398 is about 61.3931429281.

The spelling of 231398 in words is "two hundred thirty-one thousand, three hundred ninety-eight".