12688782 has 8 divisors (see below), whose sum is σ = 25377576. Its totient is φ = 4229592.

The previous prime is 12688771. The next prime is 12688811. The reversal of 12688782 is 28788621.

12688782 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 sphenic number, since it is the product of 3 distinct primes.

12688782 is an admirable number.

It is a super-2 number, since 2×12688782² = 322010377287048, 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, 1057393 + ... + 1057404.

It is an arithmetic number, because the mean of its divisors is an integer number (3172197).

Almost surely, 2^12688782 is an apocalyptic number.

12688782 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12688782 is a wasteful number, since it uses less digits than its factorization.

12688782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2114802.

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

The square root of 12688782 is about 3562.1316651690. The cubic root of 12688782 is about 233.2419401711.

The spelling of 12688782 in words is "twelve million, six hundred eighty-eight thousand, seven hundred eighty-two".