231466638 has 32 divisors (see below), whose sum is σ = 503699616. Its totient is φ = 70483968.

The previous prime is 231466633. The next prime is 231466643. The reversal of 231466638 is 836664132.

It is an interprime number because it is at equal distance from previous prime (231466633) and next prime (231466643).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 231466596 and 231466605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231466633) 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 15 ways as a sum of consecutive naturals, for example, 7731 + ... + 22862.

It is an arithmetic number, because the mean of its divisors is an integer number (15740613).

Almost surely, 2^231466638 is an apocalyptic number.

231466638 is an abundant number, since it is smaller than the sum of its proper divisors (272232978).

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

231466638 is a wasteful number, since it uses less digits than its factorization.

231466638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30708.

The product of its digits is 124416, while the sum is 39.

The square root of 231466638 is about 15214.0276718560. The cubic root of 231466638 is about 613.9921253681.

The spelling of 231466638 in words is "two hundred thirty-one million, four hundred sixty-six thousand, six hundred thirty-eight".