12628287 has 24 divisors (see below), whose sum is σ = 21359520. Its totient is φ = 7038720.

The previous prime is 12628277. The next prime is 12628303. The reversal of 12628287 is 78282621.

It is a happy number.

12628287 is a `hidden beast` number, since 1 + 2 + 628 + 28 + 7 = 666.

12628287 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12628287 - 2⁶ = 12628223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12628207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 139 + ... + 5027.

It is an arithmetic number, because the mean of its divisors is an integer number (889980).

Almost surely, 2^12628287 is an apocalyptic number.

12628287 is a deficient number, since it is larger than the sum of its proper divisors (8731233).

12628287 is a wasteful number, since it uses less digits than its factorization.

12628287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4943 (or 4940 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 12628287 is about 3553.6301158112. The cubic root of 12628287 is about 232.8706816766.

The spelling of 12628287 in words is "twelve million, six hundred twenty-eight thousand, two hundred eighty-seven".