13881504 has 144 divisors (see below), whose sum is σ = 45849888. Its totient is φ = 3644928.

The previous prime is 13881487. The next prime is 13881509. The reversal of 13881504 is 40518831.

It is not an unprimeable number, because it can be changed into a prime (13881509) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61039 + ... + 61265.

It is an arithmetic number, because the mean of its divisors is an integer number (318402).

Almost surely, 2^13881504 is an apocalyptic number.

13881504 is a gapful number since it is divisible by the number (14) 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 13881504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22924944).

13881504 is an abundant number, since it is smaller than the sum of its proper divisors (31968384).

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

13881504 is a wasteful number, since it uses less digits than its factorization.

13881504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267 (or 252 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 13881504 is about 3725.7890439476. The cubic root of 13881504 is about 240.3323174201.

The spelling of 13881504 in words is "thirteen million, eight hundred eighty-one thousand, five hundred four".