13886840 has 64 divisors (see below), whose sum is σ = 35048160. Its totient is φ = 4907520.

The previous prime is 13886839. The next prime is 13886843. The reversal of 13886840 is 4868831.

It is a junction number, because it is equal to n+sod(n) for n = 13886794 and 13886803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13886843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15854 + ... + 16706.

Almost surely, 2^13886840 is an apocalyptic number.

13886840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13886840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17524080).

13886840 is an abundant number, since it is smaller than the sum of its proper divisors (21161320).

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

13886840 is a wasteful number, since it uses less digits than its factorization.

13886840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912 (or 908 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 13886840 is about 3726.5050650710. The cubic root of 13886840 is about 240.3631077668.

Subtracting from 13886840 its reverse (4868831), we obtain a square (9018009 = 3003²).

It can be divided in two parts, 1388 and 6840, that added together give a palindrome (8228).

The spelling of 13886840 in words is "thirteen million, eight hundred eighty-six thousand, eight hundred forty".