13885440 has 112 divisors (see below), whose sum is σ = 44823888. Its totient is φ = 3670016.

The previous prime is 13885439. The next prime is 13885451. The reversal of 13885440 is 4458831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122824 + ... + 122936.

Almost surely, 2^13885440 is an apocalyptic number.

13885440 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 13885440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22411944).

13885440 is an abundant number, since it is smaller than the sum of its proper divisors (30938448).

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

13885440 is an equidigital number, since it uses as much as digits as its factorization.

13885440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 13885440 is about 3726.3172167705. The cubic root of 13885440 is about 240.3550301034.

The spelling of 13885440 in words is "thirteen million, eight hundred eighty-five thousand, four hundred forty".