13444857 has 12 divisors (see below), whose sum is σ = 20265024. Its totient is φ = 8573400.

The previous prime is 13444829. The next prime is 13444859. The reversal of 13444857 is 75844431.

It is a de Polignac number, because none of the positive numbers 2^k-13444857 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13444859) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32269 + ... + 32682.

It is an arithmetic number, because the mean of its divisors is an integer number (1688752).

Almost surely, 2^13444857 is an apocalyptic number.

It is an amenable number.

13444857 is a deficient number, since it is larger than the sum of its proper divisors (6820167).

13444857 is a wasteful number, since it uses less digits than its factorization.

13444857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64980 (or 64977 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 13444857 is about 3666.7229238109. The cubic root of 13444857 is about 237.7855151660.

The spelling of 13444857 in words is "thirteen million, four hundred forty-four thousand, eight hundred fifty-seven".