26189945 has 8 divisors (see below), whose sum is σ = 33276744. Its totient is φ = 19719424.

The previous prime is 26189921. The next prime is 26189959. The reversal of 26189945 is 54998162.

It can be written as a sum of positive squares in 4 ways, for example, as 169744 + 26020201 = 412^2 + 5101^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26189945 - 2⁸ = 26189689 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26189896 and 26189905.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153974 + ... + 154143.

It is an arithmetic number, because the mean of its divisors is an integer number (4159593).

Almost surely, 2^26189945 is an apocalyptic number.

It is an amenable number.

26189945 is a deficient number, since it is larger than the sum of its proper divisors (7086799).

26189945 is a wasteful number, since it uses less digits than its factorization.

26189945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308139.

The product of its digits is 155520, while the sum is 44.

The square root of 26189945 is about 5117.6112591716. The cubic root of 26189945 is about 296.9692818922.

The spelling of 26189945 in words is "twenty-six million, one hundred eighty-nine thousand, nine hundred forty-five".