123678856 has 32 divisors (see below), whose sum is σ = 265608000. Its totient is φ = 52888896.

The previous prime is 123678833. The next prime is 123678857. The reversal of 123678856 is 658876321.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (123678857) 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 7 ways as a sum of consecutive naturals, for example, 26335 + ... + 30673.

It is an arithmetic number, because the mean of its divisors is an integer number (8300250).

Almost surely, 2^123678856 is an apocalyptic number.

It is an amenable number.

123678856 is an abundant number, since it is smaller than the sum of its proper divisors (141929144).

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

123678856 is a wasteful number, since it uses less digits than its factorization.

123678856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4861 (or 4857 counting only the distinct ones).

The product of its digits is 483840, while the sum is 46.

The square root of 123678856 is about 11121.0995859222. The cubic root of 123678856 is about 498.2322320251.

The spelling of 123678856 in words is "one hundred twenty-three million, six hundred seventy-eight thousand, eight hundred fifty-six".