231478678 has 8 divisors (see below), whose sum is σ = 347687568. Its totient is φ = 115582824.

The previous prime is 231478669. The next prime is 231478679. The reversal of 231478678 is 876874132.

231478678 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231478679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76401 + ... + 79372.

It is an arithmetic number, because the mean of its divisors is an integer number (43460946).

Almost surely, 2^231478678 is an apocalyptic number.

231478678 is a deficient number, since it is larger than the sum of its proper divisors (116208890).

231478678 is a wasteful number, since it uses less digits than its factorization.

231478678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156518.

The product of its digits is 451584, while the sum is 46.

The square root of 231478678 is about 15214.4233541728. The cubic root of 231478678 is about 614.0027710160.

The spelling of 231478678 in words is "two hundred thirty-one million, four hundred seventy-eight thousand, six hundred seventy-eight".