13840566 has 8 divisors (see below), whose sum is σ = 27681144. Its totient is φ = 4613520.

The previous prime is 13840559. The next prime is 13840571. The reversal of 13840566 is 66504831.

13840566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

13840566 is an admirable number.

It is a super-2 number, since 2×13840566² = 383122534400712, which contains 22 as substring.

It is a Curzon number.

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, 1153375 + ... + 1153386.

It is an arithmetic number, because the mean of its divisors is an integer number (3460143).

Almost surely, 2^13840566 is an apocalyptic number.

13840566 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

13840566 is a wasteful number, since it uses less digits than its factorization.

13840566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2306766.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 13840566 is about 3720.2911176412. The cubic root of 13840566 is about 240.0958297865.

It can be divided in two parts, 138 and 40566, that added together give a palindrome (40704).

The spelling of 13840566 in words is "thirteen million, eight hundred forty thousand, five hundred sixty-six".