123312320 has 28 divisors (see below), whose sum is σ = 293638224. Its totient is φ = 49324800.

The previous prime is 123312307. The next prime is 123312331. The reversal of 123312320 is 23213321.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192356 + ... + 192995.

Almost surely, 2^123312320 is an apocalyptic number.

123312320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123312320 is an abundant number, since it is smaller than the sum of its proper divisors (170325904).

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

123312320 is an equidigital number, since it uses as much as digits as its factorization.

123312320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385368 (or 385358 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 123312320 is about 11104.6080525159. The cubic root of 123312320 is about 497.7395561875.

Adding to 123312320 its reverse (23213321), we get a palindrome (146525641).

The spelling of 123312320 in words is "one hundred twenty-three million, three hundred twelve thousand, three hundred twenty".