12308988 has 12 divisors (see below), whose sum is σ = 28721000. Its totient is φ = 4102992.

The previous prime is 12308987. The next prime is 12308999. The reversal of 12308988 is 88980321.

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

It is a super-2 number, since 2×12308988² = 303022371168288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12308981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 512863 + ... + 512886.

Almost surely, 2^12308988 is an apocalyptic number.

It is an amenable number.

12308988 is an abundant number, since it is smaller than the sum of its proper divisors (16412012).

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

12308988 is a wasteful number, since it uses less digits than its factorization.

12308988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025756 (or 1025754 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 12308988 is about 3508.4167369342. The cubic root of 12308988 is about 230.8912364426.

The spelling of 12308988 in words is "twelve million, three hundred eight thousand, nine hundred eighty-eight".