123912320 has 128 divisors (see below), whose sum is σ = 358680960. Its totient is φ = 39960576.

The previous prime is 123912307. The next prime is 123912323. The reversal of 123912320 is 23219321.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123912323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75347 + ... + 76973.

It is an arithmetic number, because the mean of its divisors is an integer number (2802195).

Almost surely, 2^123912320 is an apocalyptic number.

123912320 is a gapful number since it is divisible by the number (10) 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 123912320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179340480).

123912320 is an abundant number, since it is smaller than the sum of its proper divisors (234768640).

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

123912320 is a wasteful number, since it uses less digits than its factorization.

123912320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1670 (or 1658 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 123912320 is about 11131.5910812426. The cubic root of 123912320 is about 498.5455331549.

The spelling of 123912320 in words is "one hundred twenty-three million, nine hundred twelve thousand, three hundred twenty".