13857244 has 24 divisors (see below), whose sum is σ = 26565840. Its totient is φ = 6295296.

The previous prime is 13857229. The next prime is 13857253. The reversal of 13857244 is 44275831.

It is a super-2 number, since 2×13857244² = 384046422551072, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

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, 1542 + ... + 5485.

It is an arithmetic number, because the mean of its divisors is an integer number (1106910).

Almost surely, 2^13857244 is an apocalyptic number.

It is an amenable number.

13857244 is a deficient number, since it is larger than the sum of its proper divisors (12708596).

13857244 is a wasteful number, since it uses less digits than its factorization.

13857244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7077 (or 7075 counting only the distinct ones).

The product of its digits is 26880, while the sum is 34.

The square root of 13857244 is about 3722.5319340470. The cubic root of 13857244 is about 240.1922302495.

The spelling of 13857244 in words is "thirteen million, eight hundred fifty-seven thousand, two hundred forty-four".