12988818 has 48 divisors (see below), whose sum is σ = 29933280. Its totient is φ = 4059072.

The previous prime is 12988793. The next prime is 12988819. The reversal of 12988818 is 81888921.

It is not an unprimeable number, because it can be changed into a prime (12988819) 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, 55630 + ... + 55862.

It is an arithmetic number, because the mean of its divisors is an integer number (623610).

Almost surely, 2^12988818 is an apocalyptic number.

12988818 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12988818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14966640).

12988818 is an abundant number, since it is smaller than the sum of its proper divisors (16944462).

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

12988818 is a wasteful number, since it uses less digits than its factorization.

12988818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423 (or 420 counting only the distinct ones).

The product of its digits is 73728, while the sum is 45.

The square root of 12988818 is about 3604.0002774695. Note that the first 3 decimals coincide. The cubic root of 12988818 is about 235.0660324473.

The spelling of 12988818 in words is "twelve million, nine hundred eighty-eight thousand, eight hundred eighteen".