231868738 has 8 divisors (see below), whose sum is σ = 347922432. Its totient is φ = 115894596.

The previous prime is 231868733. The next prime is 231868739. The reversal of 231868738 is 837868132.

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

It is a super-2 number, since 2×231868738² = 107526223323425288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231868733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11970 + ... + 24637.

It is an arithmetic number, because the mean of its divisors is an integer number (43490304).

Almost surely, 2^231868738 is an apocalyptic number.

231868738 is a deficient number, since it is larger than the sum of its proper divisors (116053694).

231868738 is a wasteful number, since it uses less digits than its factorization.

231868738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39776.

The product of its digits is 387072, while the sum is 46.

The square root of 231868738 is about 15227.2367158326. The cubic root of 231868738 is about 614.3474586627.

The spelling of 231868738 in words is "two hundred thirty-one million, eight hundred sixty-eight thousand, seven hundred thirty-eight".