13443140 has 24 divisors (see below), whose sum is σ = 28631232. Its totient is φ = 5300960.

The previous prime is 13443137. The next prime is 13443151. The reversal of 13443140 is 4134431.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 3314 + ... + 6153.

It is an arithmetic number, because the mean of its divisors is an integer number (1192968).

Almost surely, 2^13443140 is an apocalyptic number.

13443140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13443140 is an abundant number, since it is smaller than the sum of its proper divisors (15188092).

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

13443140 is a wasteful number, since it uses less digits than its factorization.

13443140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9547 (or 9545 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 13443140 is about 3666.4887835639. The cubic root of 13443140 is about 237.7753924574.

Adding to 13443140 its reverse (4134431), we get a palindrome (17577571).

The spelling of 13443140 in words is "thirteen million, four hundred forty-three thousand, one hundred forty".