12687288 has 32 divisors (see below), whose sum is σ = 33388800. Its totient is φ = 4006368.

The previous prime is 12687223. The next prime is 12687331. The reversal of 12687288 is 88278621.

12687288 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13456 + ... + 14367.

It is an arithmetic number, because the mean of its divisors is an integer number (1043400).

Almost surely, 2^12687288 is an apocalyptic number.

It is an amenable number.

12687288 is an abundant number, since it is smaller than the sum of its proper divisors (20701512).

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

12687288 is a wasteful number, since it uses less digits than its factorization.

12687288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27851 (or 27847 counting only the distinct ones).

The product of its digits is 86016, while the sum is 42.

The square root of 12687288 is about 3561.9219531034. The cubic root of 12687288 is about 233.2327857033.

The spelling of 12687288 in words is "twelve million, six hundred eighty-seven thousand, two hundred eighty-eight".