231938090 has 16 divisors (see below), whose sum is σ = 418045320. Its totient is φ = 92651520.

The previous prime is 231938039. The next prime is 231938093. The reversal of 231938090 is 90839132.

231938090 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 203433169 + 28504921 = 14263^2 + 5339^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 231938090.

It is not an unprimeable number, because it can be changed into a prime (231938093) 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, 7391 + ... + 22770.

Almost surely, 2^231938090 is an apocalyptic number.

231938090 is a deficient number, since it is larger than the sum of its proper divisors (186107230).

231938090 is a wasteful number, since it uses less digits than its factorization.

231938090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30937.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 231938090 is about 15229.5137808139. The cubic root of 231938090 is about 614.4087030520.

The spelling of 231938090 in words is "two hundred thirty-one million, nine hundred thirty-eight thousand, ninety".