26840189 has 4 divisors (see below), whose sum is σ = 26850780. Its totient is φ = 26829600.

The previous prime is 26840173. The next prime is 26840227. The reversal of 26840189 is 98104862.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 98104862 = 2 ⋅49052431.

It can be written as a sum of positive squares in 2 ways, for example, as 574564 + 26265625 = 758^2 + 5125^2 .

It is a cyclic number.

It is not a de Polignac number, because 26840189 - 2⁴ = 26840173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26840119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1007 + ... + 7395.

It is an arithmetic number, because the mean of its divisors is an integer number (6712695).

Almost surely, 2^26840189 is an apocalyptic number.

It is an amenable number.

26840189 is a deficient number, since it is larger than the sum of its proper divisors (10591).

26840189 is an equidigital number, since it uses as much as digits as its factorization.

26840189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10590.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 26840189 is about 5180.7517794235. The cubic root of 26840189 is about 299.4069357627.

The spelling of 26840189 in words is "twenty-six million, eight hundred forty thousand, one hundred eighty-nine".