123430940 has 24 divisors (see below), whose sum is σ = 259413840. Its totient is φ = 49332608.

The previous prime is 123430921. The next prime is 123430961. The reversal of 123430940 is 49034321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46571 + ... + 49149.

It is an arithmetic number, because the mean of its divisors is an integer number (10808910).

Almost surely, 2^123430940 is an apocalyptic number.

123430940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123430940 is an abundant number, since it is smaller than the sum of its proper divisors (135982900).

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

123430940 is a wasteful number, since it uses less digits than its factorization.

123430940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4981 (or 4979 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 123430940 is about 11109.9477946568. The cubic root of 123430940 is about 497.8991048429.

The spelling of 123430940 in words is "one hundred twenty-three million, four hundred thirty thousand, nine hundred forty".