26305641 has 30 divisors (see below), whose sum is σ = 40711902. Its totient is φ = 16917120.

The previous prime is 26305627. The next prime is 26305651. The reversal of 26305641 is 14650362.

It can be written as a sum of positive squares in 3 ways, for example, as 1265625 + 25040016 = 1125^2 + 5004^2 .

It is not a de Polignac number, because 26305641 - 2¹⁴ = 26289257 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26305651) 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 29 ways as a sum of consecutive naturals, for example, 295525 + ... + 295613.

Almost surely, 2^26305641 is an apocalyptic number.

It is an amenable number.

26305641 is a deficient number, since it is larger than the sum of its proper divisors (14406261).

26305641 is an frugal number, since it uses more digits than its factorization.

26305641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 26305641 is about 5128.9025141837. The cubic root of 26305641 is about 297.4059340579.

The spelling of 26305641 in words is "twenty-six million, three hundred five thousand, six hundred forty-one".