231707638 has 8 divisors (see below), whose sum is σ = 348946920. Its totient is φ = 115392000.

The previous prime is 231707633. The next prime is 231707647. The reversal of 231707638 is 836707132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 231707597 and 231707606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231707633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230283 + ... + 231286.

It is an arithmetic number, because the mean of its divisors is an integer number (43618365).

Almost surely, 2^231707638 is an apocalyptic number.

231707638 is a deficient number, since it is larger than the sum of its proper divisors (117239282).

231707638 is a wasteful number, since it uses less digits than its factorization.

231707638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461822.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 231707638 is about 15221.9459334213. The cubic root of 231707638 is about 614.2051449457.

The spelling of 231707638 in words is "two hundred thirty-one million, seven hundred seven thousand, six hundred thirty-eight".