13899886 has 64 divisors (see below), whose sum is σ = 28740096. Its totient is φ = 4867200.

The previous prime is 13899881. The next prime is 13899917. The reversal of 13899886 is 68899831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13899881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106041 + ... + 106171.

It is an arithmetic number, because the mean of its divisors is an integer number (449064).

Almost surely, 2^13899886 is an apocalyptic number.

13899886 is an abundant number, since it is smaller than the sum of its proper divisors (14840210).

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

13899886 is a wasteful number, since it uses less digits than its factorization.

13899886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217.

The product of its digits is 746496, while the sum is 52.

The square root of 13899886 is about 3728.2550878394. The cubic root of 13899886 is about 240.4383539627.

Subtracting 13899886 from its reverse (68899831), we obtain a palindrome (54999945).

The spelling of 13899886 in words is "thirteen million, eight hundred ninety-nine thousand, eight hundred eighty-six".