12815988 has 12 divisors (see below), whose sum is σ = 29904000. Its totient is φ = 4271992.

The previous prime is 12815969. The next prime is 12816017. The reversal of 12815988 is 88951821.

12815988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×12815988² = 328499096832288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 533988 + ... + 534011.

It is an arithmetic number, because the mean of its divisors is an integer number (2492000).

Almost surely, 2^12815988 is an apocalyptic number.

It is an amenable number.

12815988 is an abundant number, since it is smaller than the sum of its proper divisors (17088012).

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

12815988 is a wasteful number, since it uses less digits than its factorization.

12815988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068006 (or 1068004 counting only the distinct ones).

The product of its digits is 46080, while the sum is 42.

The square root of 12815988 is about 3579.9424576381. The cubic root of 12815988 is about 234.0187726922.

The spelling of 12815988 in words is "twelve million, eight hundred fifteen thousand, nine hundred eighty-eight".