123140928 has 112 divisors (see below), whose sum is σ = 356396544. Its totient is φ = 37355520.

The previous prime is 123140923. The next prime is 123140933. The reversal of 123140928 is 829041321.

It is an interprime number because it is at equal distance from previous prime (123140923) and next prime (123140933).

It is a junction number, because it is equal to n+sod(n) for n = 123140895 and 123140904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123140923) 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, 100576 + ... + 101792.

It is an arithmetic number, because the mean of its divisors is an integer number (3182112).

Almost surely, 2^123140928 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 123140928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178198272).

123140928 is an abundant number, since it is smaller than the sum of its proper divisors (233255616).

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

123140928 is a wasteful number, since it uses less digits than its factorization.

123140928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280 (or 1270 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 123140928 is about 11096.8882124675. Note that the first 3 decimals coincide. The cubic root of 123140928 is about 497.5088462523.

The spelling of 123140928 in words is "one hundred twenty-three million, one hundred forty thousand, nine hundred twenty-eight".