231788 has 6 divisors (see below), whose sum is σ = 405636. Its totient is φ = 115892.

The previous prime is 231779. The next prime is 231799. The reversal of 231788 is 887132.

231788 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 231788.

It is an unprimeable number.

231788 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28970 + ... + 28977.

It is an arithmetic number, because the mean of its divisors is an integer number (67606).

2²³¹⁷⁸⁸ is an apocalyptic number.

It is an amenable number.

231788 is a deficient number, since it is larger than the sum of its proper divisors (173848).

231788 is a wasteful number, since it uses less digits than its factorization.

231788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57951 (or 57949 counting only the distinct ones).

The product of its digits is 2688, while the sum is 29.

The square root of 231788 is about 481.4436623324. The cubic root of 231788 is about 61.4276143970.

The spelling of 231788 in words is "two hundred thirty-one thousand, seven hundred eighty-eight".