13881642 has 16 divisors (see below), whose sum is σ = 28039392. Its totient is φ = 4581200.

The previous prime is 13881641. The next prime is 13881649. The reversal of 13881642 is 24618831.

13881642 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (13881641) 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, 10848 + ... + 12059.

It is an arithmetic number, because the mean of its divisors is an integer number (1752462).

Almost surely, 2^13881642 is an apocalyptic number.

13881642 is an abundant number, since it is smaller than the sum of its proper divisors (14157750).

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

13881642 is a wasteful number, since it uses less digits than its factorization.

13881642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23013.

The product of its digits is 9216, while the sum is 33.

The square root of 13881642 is about 3725.8075634686. The cubic root of 13881642 is about 240.3331138216. Note that the first 3 decimals are identical.

The spelling of 13881642 in words is "thirteen million, eight hundred eighty-one thousand, six hundred forty-two".