123278916 has 24 divisors (see below), whose sum is σ = 302790880. Its totient is φ = 38930112.

The previous prime is 123278887. The next prime is 123278921. The reversal of 123278916 is 619872321.

It is a super-2 number, since 2×123278916² = 30395382260270112, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270121 + ... + 270576.

Almost surely, 2^123278916 is an apocalyptic number.

It is an amenable number.

123278916 is an abundant number, since it is smaller than the sum of its proper divisors (179511964).

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

123278916 is a wasteful number, since it uses less digits than its factorization.

123278916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540723 (or 540721 counting only the distinct ones).

The product of its digits is 36288, while the sum is 39.

The square root of 123278916 is about 11103.1038903543. The cubic root of 123278916 is about 497.6946080059.

The spelling of 123278916 in words is "one hundred twenty-three million, two hundred seventy-eight thousand, nine hundred sixteen".