13668040 has 16 divisors (see below), whose sum is σ = 30753180. Its totient is φ = 5467200.

The previous prime is 13668037. The next prime is 13668041. The reversal of 13668040 is 4086631.

It can be written as a sum of positive squares in 2 ways, for example, as 13439556 + 228484 = 3666^2 + 478^2 .

It is not an unprimeable number, because it can be changed into a prime (13668041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170811 + ... + 170890.

Almost surely, 2^13668040 is an apocalyptic number.

13668040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13668040 is an abundant number, since it is smaller than the sum of its proper divisors (17085140).

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

13668040 is a wasteful number, since it uses less digits than its factorization.

13668040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341712 (or 341708 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 13668040 is about 3697.0312414152. The cubic root of 13668040 is about 239.0940381448.

The spelling of 13668040 in words is "thirteen million, six hundred sixty-eight thousand, forty".