26191849 has 4 divisors (see below), whose sum is σ = 27732564. Its totient is φ = 24651136.

The previous prime is 26191813. The next prime is 26191853. The reversal of 26191849 is 94819162.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7425625 + 18766224 = 2725^2 + 4332^2 .

It is a cyclic number.

It is not a de Polignac number, because 26191849 - 2¹³ = 26183657 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26191049) 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, 770332 + ... + 770365.

It is an arithmetic number, because the mean of its divisors is an integer number (6933141).

Almost surely, 2^26191849 is an apocalyptic number.

It is an amenable number.

26191849 is a deficient number, since it is larger than the sum of its proper divisors (1540715).

26191849 is a wasteful number, since it uses less digits than its factorization.

26191849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540714.

The product of its digits is 31104, while the sum is 40.

The square root of 26191849 is about 5117.7972800806. The cubic root of 26191849 is about 296.9764782394.

The spelling of 26191849 in words is "twenty-six million, one hundred ninety-one thousand, eight hundred forty-nine".