26855819 has 4 divisors (see below), whose sum is σ = 26874120. Its totient is φ = 26837520.

The previous prime is 26855791. The next prime is 26855831. The reversal of 26855819 is 91855862.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 26855819 - 2¹² = 26851723 is a prime.

It is a super-2 number, since 2×26855819² = 1442470028321522, which contains 22 as substring.

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 26855819.

It is not an unprimeable number, because it can be changed into a prime (26855849) 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, 6737 + ... + 9954.

It is an arithmetic number, because the mean of its divisors is an integer number (6718530).

Almost surely, 2^26855819 is an apocalyptic number.

26855819 is a deficient number, since it is larger than the sum of its proper divisors (18301).

26855819 is a wasteful number, since it uses less digits than its factorization.

26855819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18300.

The product of its digits is 172800, while the sum is 44.

The square root of 26855819 is about 5182.2600282116. The cubic root of 26855819 is about 299.4650429331.

The spelling of 26855819 in words is "twenty-six million, eight hundred fifty-five thousand, eight hundred nineteen".