123278904 has 144 divisors (see below), whose sum is σ = 394004520. Its totient is φ = 34715520.

The previous prime is 123278887. The next prime is 123278921. The reversal of 123278904 is 409872321.

It is an interprime number because it is at equal distance from previous prime (123278887) and next prime (123278921).

It is a Harshad number since it is a multiple of its sum of digits (36).

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 35 ways as a sum of consecutive naturals, for example, 292614 + ... + 293034.

Almost surely, 2^123278904 is an apocalyptic number.

123278904 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123278904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197002260).

123278904 is an abundant number, since it is smaller than the sum of its proper divisors (270725616).

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

123278904 is a wasteful number, since it uses less digits than its factorization.

123278904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530 (or 516 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 123278904 is about 11103.1033499648. The cubic root of 123278904 is about 497.6945918573.

The spelling of 123278904 in words is "one hundred twenty-three million, two hundred seventy-eight thousand, nine hundred four".