13857657 has 8 divisors (see below), whose sum is σ = 20156640. Its totient is φ = 8398560.

The previous prime is 13857637. The next prime is 13857667. The reversal of 13857657 is 75675831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13857657 - 2⁸ = 13857401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13857607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209932 + ... + 209997.

It is an arithmetic number, because the mean of its divisors is an integer number (2519580).

Almost surely, 2^13857657 is an apocalyptic number.

It is an amenable number.

13857657 is a deficient number, since it is larger than the sum of its proper divisors (6298983).

13857657 is a wasteful number, since it uses less digits than its factorization.

13857657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419943.

The product of its digits is 176400, while the sum is 42.

The square root of 13857657 is about 3722.5874066300. The cubic root of 13857657 is about 240.1946164481.

The spelling of 13857657 in words is "thirteen million, eight hundred fifty-seven thousand, six hundred fifty-seven".