123240192 has 72 divisors (see below), whose sum is σ = 336941136. Its totient is φ = 39960576.

The previous prime is 123240179. The next prime is 123240199. The reversal of 123240192 is 291042321.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123240199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26248 + ... + 30584.

It is an arithmetic number, because the mean of its divisors is an integer number (4679738).

Almost surely, 2^123240192 is an apocalyptic number.

123240192 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 123240192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168470568).

123240192 is an abundant number, since it is smaller than the sum of its proper divisors (213700944).

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

123240192 is an equidigital number, since it uses as much as digits as its factorization.

123240192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4393 (or 4379 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 123240192 is about 11101.3599166949. The cubic root of 123240192 is about 497.6424911072.

The spelling of 123240192 in words is "one hundred twenty-three million, two hundred forty thousand, one hundred ninety-two".