123940192 has 48 divisors (see below), whose sum is σ = 268047360. Its totient is φ = 56149632.

The previous prime is 123940181. The next prime is 123940199. The reversal of 123940192 is 291049321.

It is a super-2 number, since 2×123940192² = 30722342385993728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123940199) 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, 9553 + ... + 18415.

It is an arithmetic number, because the mean of its divisors is an integer number (5584320).

Almost surely, 2^123940192 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123940192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134023680).

123940192 is an abundant number, since it is smaller than the sum of its proper divisors (144107168).

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

123940192 is a wasteful number, since it uses less digits than its factorization.

123940192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8915 (or 8907 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 123940192 is about 11132.8429432917. The cubic root of 123940192 is about 498.5829101738.

The spelling of 123940192 in words is "one hundred twenty-three million, nine hundred forty thousand, one hundred ninety-two".