13928881 has 4 divisors (see below), whose sum is σ = 14662000. Its totient is φ = 13195764.

The previous prime is 13928867. The next prime is 13928891. The reversal of 13928881 is 18882931.

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, and also an emirpimes, since its reverse is a distinct semiprime: 18882931 = 23 ⋅820997.

It is a cyclic number.

It is not a de Polignac number, because 13928881 - 2⁷ = 13928753 is a prime.

It is a super-2 number, since 2×13928881² = 388027451824322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13928891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 366531 + ... + 366568.

It is an arithmetic number, because the mean of its divisors is an integer number (3665500).

Almost surely, 2^13928881 is an apocalyptic number.

It is an amenable number.

13928881 is a deficient number, since it is larger than the sum of its proper divisors (733119).

13928881 is an equidigital number, since it uses as much as digits as its factorization.

13928881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733118.

The product of its digits is 27648, while the sum is 40.

The square root of 13928881 is about 3732.1416103894. The cubic root of 13928881 is about 240.6054217162.

The spelling of 13928881 in words is "thirteen million, nine hundred twenty-eight thousand, eight hundred eighty-one".