26191089 has 24 divisors (see below), whose sum is σ = 40847040. Its totient is φ = 16121952.

The previous prime is 26191073. The next prime is 26191093. The reversal of 26191089 is 98019162.

It is not a de Polignac number, because 26191089 - 2⁴ = 26191073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26191019) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3822 + ... + 8184.

It is an arithmetic number, because the mean of its divisors is an integer number (1701960).

Almost surely, 2^26191089 is an apocalyptic number.

26191089 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

26191089 is a deficient number, since it is larger than the sum of its proper divisors (14655951).

26191089 is a wasteful number, since it uses less digits than its factorization.

26191089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4421 (or 4418 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 26191089 is about 5117.7230288479. The cubic root of 26191089 is about 296.9736057897.

The spelling of 26191089 in words is "twenty-six million, one hundred ninety-one thousand, eighty-nine".