13840557 has 8 divisors (see below), whose sum is σ = 18626976. Its totient is φ = 9140592.

The previous prime is 13840523. The next prime is 13840559. The reversal of 13840557 is 75504831.

13840557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 13840557 - 2¹⁸ = 13578413 is a prime.

It is a super-2 number, since 2×13840557² = 383122036140498, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13840559) 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, 21238 + ... + 21879.

It is an arithmetic number, because the mean of its divisors is an integer number (2328372).

Almost surely, 2^13840557 is an apocalyptic number.

It is an amenable number.

13840557 is a deficient number, since it is larger than the sum of its proper divisors (4786419).

13840557 is a wasteful number, since it uses less digits than its factorization.

13840557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43227.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 13840557 is about 3720.2899080582. The cubic root of 13840557 is about 240.0957777447.

The spelling of 13840557 in words is "thirteen million, eight hundred forty thousand, five hundred fifty-seven".