12987788 has 24 divisors (see below), whose sum is σ = 25220160. Its totient is φ = 5802320.

The previous prime is 12987781. The next prime is 12987797. The reversal of 12987788 is 88778921.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12987781) 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 7 ways as a sum of consecutive naturals, for example, 95 + ... + 5097.

It is an arithmetic number, because the mean of its divisors is an integer number (1050840).

Almost surely, 2^12987788 is an apocalyptic number.

It is an amenable number.

12987788 is a deficient number, since it is larger than the sum of its proper divisors (12232372).

12987788 is a wasteful number, since it uses less digits than its factorization.

12987788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5077 (or 5075 counting only the distinct ones).

The product of its digits is 451584, while the sum is 50.

The square root of 12987788 is about 3603.8573778661. The cubic root of 12987788 is about 235.0598187843.

The spelling of 12987788 in words is "twelve million, nine hundred eighty-seven thousand, seven hundred eighty-eight".