26209089 has 20 divisors (see below), whose sum is σ = 39291120. Its totient is φ = 17410680.

The previous prime is 26209081. The next prime is 26209097. The reversal of 26209089 is 98090262.

It is an interprime number because it is at equal distance from previous prime (26209081) and next prime (26209097).

It is not a de Polignac number, because 26209089 - 2³ = 26209081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26209081) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 39442 + ... + 40100.

It is an arithmetic number, because the mean of its divisors is an integer number (1964556).

Almost surely, 2^26209089 is an apocalyptic number.

It is an amenable number.

26209089 is a deficient number, since it is larger than the sum of its proper divisors (13082031).

26209089 is an equidigital number, since it uses as much as digits as its factorization.

26209089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162 (or 1153 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 26209089 is about 5119.4813213840. The cubic root of 26209089 is about 297.0416225719.

Adding to 26209089 its product of nonzero digits (15552), we get a square (26224641 = 5121²).

The spelling of 26209089 in words is "twenty-six million, two hundred nine thousand, eighty-nine".