13999888 has 40 divisors (see below), whose sum is σ = 31644800. Its totient is φ = 5997600.

The previous prime is 13999877. The next prime is 13999889. The reversal of 13999888 is 88899931.

13999888 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

13999888 is strictly pandigital in base 8.

It is a zygodrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (13999889) 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, 4213 + ... + 6763.

It is an arithmetic number, because the mean of its divisors is an integer number (791120).

Almost surely, 2^13999888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13999888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15822400).

13999888 is an abundant number, since it is smaller than the sum of its proper divisors (17644912).

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

13999888 is an equidigital number, since it uses as much as digits as its factorization.

13999888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2580 (or 2560 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 55.

The square root of 13999888 is about 3741.6424201145. The cubic root of 13999888 is about 241.0135837112.

The spelling of 13999888 in words is "thirteen million, nine hundred ninety-nine thousand, eight hundred eighty-eight".