231889788 has 36 divisors (see below), whose sum is σ = 631256808. Its totient is φ = 71350560.

The previous prime is 231889783. The next prime is 231889789. The reversal of 231889788 is 887988132.

231889788 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231889783) 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, 247278 + ... + 248213.

Almost surely, 2^231889788 is an apocalyptic number.

It is an amenable number.

231889788 is an abundant number, since it is smaller than the sum of its proper divisors (399367020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231889788 is a wasteful number, since it uses less digits than its factorization.

231889788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495514 (or 495509 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 54.

The square root of 231889788 is about 15227.9278958104. The cubic root of 231889788 is about 614.3660490985.

The spelling of 231889788 in words is "two hundred thirty-one million, eight hundred eighty-nine thousand, seven hundred eighty-eight".