13866628 has 12 divisors (see below), whose sum is σ = 25694172. Its totient is φ = 6525440.

The previous prime is 13866623. The next prime is 13866649. The reversal of 13866628 is 82666831.

It can be written as a sum of positive squares in 2 ways, for example, as 6801664 + 7064964 = 2608^2 + 2658^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13866623) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 101893 + ... + 102028.

It is an arithmetic number, because the mean of its divisors is an integer number (2141181).

Almost surely, 2^13866628 is an apocalyptic number.

It is an amenable number.

13866628 is a deficient number, since it is larger than the sum of its proper divisors (11827544).

13866628 is a wasteful number, since it uses less digits than its factorization.

13866628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203942 (or 203940 counting only the distinct ones).

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

The square root of 13866628 is about 3723.7921531686. The cubic root of 13866628 is about 240.2464366822.

It can be divided in two parts, 138 and 66628, that added together give a palindrome (66766).

The spelling of 13866628 in words is "thirteen million, eight hundred sixty-six thousand, six hundred twenty-eight".