123490940 has 12 divisors (see below), whose sum is σ = 259331016. Its totient is φ = 49396368.

The previous prime is 123490931. The next prime is 123490943. The reversal of 123490940 is 49094321.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 123490897 and 123490906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123490943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3087254 + ... + 3087293.

It is an arithmetic number, because the mean of its divisors is an integer number (21610918).

Almost surely, 2^123490940 is an apocalyptic number.

123490940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123490940 is an abundant number, since it is smaller than the sum of its proper divisors (135840076).

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

123490940 is a wasteful number, since it uses less digits than its factorization.

123490940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6174556 (or 6174554 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 123490940 is about 11112.6477492990. The cubic root of 123490940 is about 497.9797683216.

The spelling of 123490940 in words is "one hundred twenty-three million, four hundred ninety thousand, nine hundred forty".