26872289 has 4 divisors (see below), whose sum is σ = 28286640. Its totient is φ = 25457940.

The previous prime is 26872283. The next prime is 26872309. The reversal of 26872289 is 98227862.

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 a de Polignac number, because none of the positive numbers 2^k-26872289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26872283) 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, 707147 + ... + 707184.

It is an arithmetic number, because the mean of its divisors is an integer number (7071660).

Almost surely, 2^26872289 is an apocalyptic number.

It is an amenable number.

26872289 is a deficient number, since it is larger than the sum of its proper divisors (1414351).

26872289 is a wasteful number, since it uses less digits than its factorization.

26872289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1414350.

The product of its digits is 193536, while the sum is 44.

The square root of 26872289 is about 5183.8488596795. The cubic root of 26872289 is about 299.5262485553.

The spelling of 26872289 in words is "twenty-six million, eight hundred seventy-two thousand, two hundred eighty-nine".