231642858 has 16 divisors (see below), whose sum is σ = 464926176. Its totient is φ = 76940880.

The previous prime is 231642857. The next prime is 231642883. The reversal of 231642858 is 858246132.

It is a super-4 number, since 4×231642858⁴ (a number of 35 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (231642857) 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 7 ways as a sum of consecutive naturals, for example, 66513 + ... + 69908.

It is an arithmetic number, because the mean of its divisors is an integer number (29057886).

Almost surely, 2^231642858 is an apocalyptic number.

231642858 is an abundant number, since it is smaller than the sum of its proper divisors (233283318).

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

231642858 is a wasteful number, since it uses less digits than its factorization.

231642858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136709.

The product of its digits is 92160, while the sum is 39.

The square root of 231642858 is about 15219.8179358362. The cubic root of 231642858 is about 614.1479005116.

The spelling of 231642858 in words is "two hundred thirty-one million, six hundred forty-two thousand, eight hundred fifty-eight".