13828861 has 4 divisors (see below), whose sum is σ = 14202652. Its totient is φ = 13455072.

The previous prime is 13828847. The next prime is 13828873. The reversal of 13828861 is 16882831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16882831 = 7 ⋅2411833.

It can be written as a sum of positive squares in 2 ways, for example, as 9548100 + 4280761 = 3090^2 + 2069^2 .

It is a cyclic number.

It is not a de Polignac number, because 13828861 - 2⁹ = 13828349 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 373753 = 13828861 / (1 + 3 + 8 + 2 + 8 + 8 + 6 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13828861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13828831) 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, 186840 + ... + 186913.

It is an arithmetic number, because the mean of its divisors is an integer number (3550663).

Almost surely, 2^13828861 is an apocalyptic number.

It is an amenable number.

13828861 is a deficient number, since it is larger than the sum of its proper divisors (373791).

13828861 is an equidigital number, since it uses as much as digits as its factorization.

13828861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373790.

The product of its digits is 18432, while the sum is 37.

The square root of 13828861 is about 3718.7176553215. The cubic root of 13828861 is about 240.0281274904.

The spelling of 13828861 in words is "thirteen million, eight hundred twenty-eight thousand, eight hundred sixty-one".