123431740 has 24 divisors (see below), whose sum is σ = 260517600. Its totient is φ = 49123008.

The previous prime is 123431723. The next prime is 123431807. The reversal of 123431740 is 47134321.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11527 + ... + 19486.

It is an arithmetic number, because the mean of its divisors is an integer number (10854900).

Almost surely, 2^123431740 is an apocalyptic number.

123431740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123431740 is an abundant number, since it is smaller than the sum of its proper divisors (137085860).

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

123431740 is a wasteful number, since it uses less digits than its factorization.

123431740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31221 (or 31219 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 123431740 is about 11109.9837983680. The cubic root of 123431740 is about 497.9001805279.

The spelling of 123431740 in words is "one hundred twenty-three million, four hundred thirty-one thousand, seven hundred forty".