13668628 has 12 divisors (see below), whose sum is σ = 24745140. Its totient is φ = 6598592.

The previous prime is 13668583. The next prime is 13668631. The reversal of 13668628 is 82686631.

It can be written as a sum of positive squares in 2 ways, for example, as 2566404 + 11102224 = 1602^2 + 3332^2 .

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, 58801 + ... + 59032.

It is an arithmetic number, because the mean of its divisors is an integer number (2062095).

Almost surely, 2^13668628 is an apocalyptic number.

It is an amenable number.

13668628 is a deficient number, since it is larger than the sum of its proper divisors (11076512).

13668628 is a wasteful number, since it uses less digits than its factorization.

13668628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117866 (or 117864 counting only the distinct ones).

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

The square root of 13668628 is about 3697.1107638263. The cubic root of 13668628 is about 239.0974667095.

The spelling of 13668628 in words is "thirteen million, six hundred sixty-eight thousand, six hundred twenty-eight".