13840881 has 4 divisors (see below), whose sum is σ = 18454512. Its totient is φ = 9227252.

The previous prime is 13840877. The next prime is 13840909. The reversal of 13840881 is 18804831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13840881 - 2² = 13840877 is a prime.

It is a super-2 number, since 2×13840881² = 383139973712322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13840861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2306811 + ... + 2306816.

It is an arithmetic number, because the mean of its divisors is an integer number (4613628).

Almost surely, 2^13840881 is an apocalyptic number.

It is an amenable number.

13840881 is a deficient number, since it is larger than the sum of its proper divisors (4613631).

13840881 is an equidigital number, since it uses as much as digits as its factorization.

13840881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4613630.

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 13840881 is about 3720.3334527969. Note that the first 3 decimals coincide. The cubic root of 13840881 is about 240.0976512345.

The spelling of 13840881 in words is "thirteen million, eight hundred forty thousand, eight hundred eighty-one".