12999888 has 120 divisors (see below), whose sum is σ = 41202720. Its totient is φ = 3790080.

The previous prime is 12999869. The next prime is 12999919. The reversal of 12999888 is 88899921.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 45795 + ... + 46077.

It is an arithmetic number, because the mean of its divisors is an integer number (343356).

Almost surely, 2^12999888 is an apocalyptic number.

12999888 is a gapful number since it is divisible by the number (18) 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 12999888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20601360).

12999888 is an abundant number, since it is smaller than the sum of its proper divisors (28202832).

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

12999888 is a wasteful number, since it uses less digits than its factorization.

12999888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337 (or 328 counting only the distinct ones).

The product of its digits is 746496, while the sum is 54.

The square root of 12999888 is about 3605.5357438250. The cubic root of 12999888 is about 235.1327935150.

The spelling of 12999888 in words is "twelve million, nine hundred ninety-nine thousand, eight hundred eighty-eight".