13288656 has 20 divisors (see below), whose sum is σ = 34329152. Its totient is φ = 4429536.

The previous prime is 13288631. The next prime is 13288673. The reversal of 13288656 is 65688231.

It is a happy number.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

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, 138376 + ... + 138471.

Almost surely, 2^13288656 is an apocalyptic number.

13288656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13288656 is an abundant number, since it is smaller than the sum of its proper divisors (21040496).

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

13288656 is a wasteful number, since it uses less digits than its factorization.

13288656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276858 (or 276852 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 13288656 is about 3645.3608874843. The cubic root of 13288656 is about 236.8610697433.

It can be divided in two parts, 132 and 88656, that added together give a palindrome (88788).

The spelling of 13288656 in words is "thirteen million, two hundred eighty-eight thousand, six hundred fifty-six".