12813988 has 48 divisors (see below), whose sum is σ = 26659584. Its totient is φ = 5322240.

The previous prime is 12813979. The next prime is 12813989. The reversal of 12813988 is 88931821.

It is a self number, because there is not a number n which added to its sum of digits gives 12813988.

It is not an unprimeable number, because it can be changed into a prime (12813989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27445 + ... + 27907.

It is an arithmetic number, because the mean of its divisors is an integer number (555408).

Almost surely, 2^12813988 is an apocalyptic number.

It is an amenable number.

12813988 is an abundant number, since it is smaller than the sum of its proper divisors (13845596).

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

12813988 is a wasteful number, since it uses less digits than its factorization.

12813988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532 (or 530 counting only the distinct ones).

The product of its digits is 27648, while the sum is 40.

The square root of 12813988 is about 3579.6631126406. The cubic root of 12813988 is about 234.0065987863.

The spelling of 12813988 in words is "twelve million, eight hundred thirteen thousand, nine hundred eighty-eight".