13666288 has 40 divisors (see below), whose sum is σ = 27855360. Its totient is φ = 6486720.

The previous prime is 13666277. The next prime is 13666297. The reversal of 13666288 is 88266631.

It is a self number, because there is not a number n which added to its sum of digits gives 13666288.

It is a congruent number.

It is an unprimeable number.

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, 29031 + ... + 29497.

It is an arithmetic number, because the mean of its divisors is an integer number (696384).

Almost surely, 2^13666288 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13666288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13927680).

13666288 is an abundant number, since it is smaller than the sum of its proper divisors (14189072).

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

13666288 is a wasteful number, since it uses less digits than its factorization.

13666288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565 (or 559 counting only the distinct ones).

The product of its digits is 82944, while the sum is 40.

The square root of 13666288 is about 3696.7942869465. The cubic root of 13666288 is about 239.0838218384.

The spelling of 13666288 in words is "thirteen million, six hundred sixty-six thousand, two hundred eighty-eight".