12909888 has 112 divisors (see below), whose sum is σ = 39339520. Its totient is φ = 4147200.

The previous prime is 12909887. The next prime is 12909893. The reversal of 12909888 is 88890921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12909887) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 53448 + ... + 53688.

Almost surely, 2^12909888 is an apocalyptic number.

12909888 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 12909888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19669760).

12909888 is an abundant number, since it is smaller than the sum of its proper divisors (26429632).

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

12909888 is a wasteful number, since it uses less digits than its factorization.

12909888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293 (or 277 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The square root of 12909888 is about 3593.0332589610. The cubic root of 12909888 is about 234.5889176547.

The spelling of 12909888 in words is "twelve million, nine hundred nine thousand, eight hundred eighty-eight".