13431140 has 12 divisors (see below), whose sum is σ = 28205436. Its totient is φ = 5372448.

The previous prime is 13431137. The next prime is 13431161. The reversal of 13431140 is 4113431.

13431140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 5635876 + 7795264 = 2374^2 + 2792^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 335759 + ... + 335798.

It is an arithmetic number, because the mean of its divisors is an integer number (2350453).

Almost surely, 2^13431140 is an apocalyptic number.

13431140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13431140 is an abundant number, since it is smaller than the sum of its proper divisors (14774296).

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

13431140 is a wasteful number, since it uses less digits than its factorization.

13431140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671566 (or 671564 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 13431140 is about 3664.8519751826. The cubic root of 13431140 is about 237.7046214388.

Adding to 13431140 its reverse (4113431), we get a palindrome (17544571).

The spelling of 13431140 in words is "thirteen million, four hundred thirty-one thousand, one hundred forty".