123279312 has 80 divisors (see below), whose sum is σ = 354088448. Its totient is φ = 36702720.

The previous prime is 123279283. The next prime is 123279349. The reversal of 123279312 is 213972321.

It is a self number, because there is not a number n which added to its sum of digits gives 123279312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16158 + ... + 22530.

Almost surely, 2^123279312 is an apocalyptic number.

123279312 is a gapful number since it is divisible by the number (12) 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 123279312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177044224).

123279312 is an abundant number, since it is smaller than the sum of its proper divisors (230809136).

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

123279312 is a wasteful number, since it uses less digits than its factorization.

123279312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6428 (or 6422 counting only the distinct ones).

The product of its digits is 4536, while the sum is 30.

The square root of 123279312 is about 11103.1217231912. The cubic root of 123279312 is about 497.6951409082.

The spelling of 123279312 in words is "one hundred twenty-three million, two hundred seventy-nine thousand, three hundred twelve".