231678656 has 28 divisors (see below), whose sum is σ = 501533160. Its totient is φ = 105308160.

The previous prime is 231678653. The next prime is 231678673. The reversal of 231678656 is 656876132.

It is a super-3 number, since 3×231678656³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (231678653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163841 + ... + 165248.

Almost surely, 2^231678656 is an apocalyptic number.

It is an amenable number.

231678656 is an abundant number, since it is smaller than the sum of its proper divisors (269854504).

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

231678656 is a wasteful number, since it uses less digits than its factorization.

231678656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329112 (or 329102 counting only the distinct ones).

The product of its digits is 362880, while the sum is 44.

The square root of 231678656 is about 15220.9939228685. The cubic root of 231678656 is about 614.1795356104.

The spelling of 231678656 in words is "two hundred thirty-one million, six hundred seventy-eight thousand, six hundred fifty-six".