13887642 has 16 divisors (see below), whose sum is σ = 27814752. Its totient is φ = 4622640.

The previous prime is 13887641. The next prime is 13887677. The reversal of 13887642 is 24678831.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 13887642.

It is not an unprimeable number, because it can be changed into a prime (13887641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4993 + ... + 7259.

It is an arithmetic number, because the mean of its divisors is an integer number (1738422).

Almost surely, 2^13887642 is an apocalyptic number.

13887642 is an abundant number, since it is smaller than the sum of its proper divisors (13927110).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13887642 is a wasteful number, since it uses less digits than its factorization.

13887642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3293.

The product of its digits is 64512, while the sum is 39.

The square root of 13887642 is about 3726.6126710459. The cubic root of 13887642 is about 240.3677348694.

The spelling of 13887642 in words is "thirteen million, eight hundred eighty-seven thousand, six hundred forty-two".