13440357 has 24 divisors (see below), whose sum is σ = 23164800. Its totient is φ = 7679448.

The previous prime is 13440341. The next prime is 13440379. The reversal of 13440357 is 75304431.

13440357 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13440357 - 2⁴ = 13440341 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 13440357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13440307) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3757 + ... + 6402.

It is an arithmetic number, because the mean of its divisors is an integer number (965200).

Almost surely, 2^13440357 is an apocalyptic number.

It is an amenable number.

13440357 is a deficient number, since it is larger than the sum of its proper divisors (9724443).

13440357 is a wasteful number, since it uses less digits than its factorization.

13440357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10182 (or 10169 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 13440357 is about 3666.1092455081. The cubic root of 13440357 is about 237.7589832309.

Adding to 13440357 its reverse (75304431), we get a palindrome (88744788).

The spelling of 13440357 in words is "thirteen million, four hundred forty thousand, three hundred fifty-seven".