123868428 has 12 divisors (see below), whose sum is σ = 289026360. Its totient is φ = 41289472.

The previous prime is 123868411. The next prime is 123868439. The reversal of 123868428 is 824868321.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 123868428.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5161173 + ... + 5161196.

It is an arithmetic number, because the mean of its divisors is an integer number (24085530).

Almost surely, 2^123868428 is an apocalyptic number.

It is an amenable number.

123868428 is an abundant number, since it is smaller than the sum of its proper divisors (165157932).

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

123868428 is a wasteful number, since it uses less digits than its factorization.

123868428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10322376 (or 10322374 counting only the distinct ones).

The product of its digits is 147456, while the sum is 42.

The square root of 123868428 is about 11129.6194005006. The cubic root of 123868428 is about 498.4866615680.

The spelling of 123868428 in words is "one hundred twenty-three million, eight hundred sixty-eight thousand, four hundred twenty-eight".