123789312 has 168 divisors, whose sum is σ = 378250704. Its totient is φ = 38928384.

The previous prime is 123789301. The next prime is 123789317. The reversal of 123789312 is 213987321.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123789317) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1695708 + ... + 1695780.

Almost surely, 2^123789312 is an apocalyptic number.

123789312 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 123789312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189125352).

123789312 is an abundant number, since it is smaller than the sum of its proper divisors (254461392).

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

123789312 is an equidigital number, since it uses as much as digits as its factorization.

123789312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 101 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 123789312 is about 11126.0645333379. The cubic root of 123789312 is about 498.3805094977.

The spelling of 123789312 in words is "one hundred twenty-three million, seven hundred eighty-nine thousand, three hundred twelve".