123278870 has 32 divisors (see below), whose sum is σ = 260699040. Its totient is φ = 41379840.

The previous prime is 123278867. The next prime is 123278887. The reversal of 123278870 is 78872321.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 41675 + ... + 44534.

It is an arithmetic number, because the mean of its divisors is an integer number (8146845).

Almost surely, 2^123278870 is an apocalyptic number.

123278870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123278870 is an abundant number, since it is smaller than the sum of its proper divisors (137420170).

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

123278870 is a wasteful number, since it uses less digits than its factorization.

123278870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86240.

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 123278870 is about 11103.1018188613. The cubic root of 123278870 is about 497.6945461030.

The spelling of 123278870 in words is "one hundred twenty-three million, two hundred seventy-eight thousand, eight hundred seventy".