13668442 has 16 divisors (see below), whose sum is σ = 21957480. Its totient is φ = 6358528.

The previous prime is 13668439. The next prime is 13668443. The reversal of 13668442 is 24486631.

It can be written as a sum of positive squares in 4 ways, for example, as 7017201 + 6651241 = 2649^2 + 2579^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 13668398 and 13668407.

It is not an unprimeable number, because it can be changed into a prime (13668443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 768 + ... + 5284.

Almost surely, 2^13668442 is an apocalyptic number.

13668442 is a deficient number, since it is larger than the sum of its proper divisors (8289038).

13668442 is a wasteful number, since it uses less digits than its factorization.

13668442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4625.

The product of its digits is 27648, while the sum is 34.

The square root of 13668442 is about 3697.0856089628. The cubic root of 13668442 is about 239.0963821742.

The spelling of 13668442 in words is "thirteen million, six hundred sixty-eight thousand, four hundred forty-two".