12431840 has 24 divisors (see below), whose sum is σ = 29370600. Its totient is φ = 4972672.

The previous prime is 12431821. The next prime is 12431843. The reversal of 12431840 is 4813421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12431843) 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 3 ways as a sum of consecutive naturals, for example, 38690 + ... + 39009.

It is an arithmetic number, because the mean of its divisors is an integer number (1223775).

Almost surely, 2^12431840 is an apocalyptic number.

12431840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12431840 is an abundant number, since it is smaller than the sum of its proper divisors (16938760).

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

12431840 is an equidigital number, since it uses as much as digits as its factorization.

12431840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77714 (or 77706 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 12431840 is about 3525.8814500774. The cubic root of 12431840 is about 231.6568450425.

The spelling of 12431840 in words is "twelve million, four hundred thirty-one thousand, eight hundred forty".