26305993 has 6 divisors (see below), whose sum is σ = 30600906. Its totient is φ = 22547952.

The previous prime is 26305991. The next prime is 26306017. The reversal of 26305993 is 39950362.

It can be written as a sum of positive squares in only one way, i.e., 23736384 + 2569609 = 4872^2 + 1603^2 .

It is not a de Polignac number, because 26305993 - 2¹ = 26305991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26305991) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 268380 + ... + 268477.

It is an arithmetic number, because the mean of its divisors is an integer number (5100151).

Almost surely, 2^26305993 is an apocalyptic number.

It is an amenable number.

26305993 is a deficient number, since it is larger than the sum of its proper divisors (4294913).

26305993 is an equidigital number, since it uses as much as digits as its factorization.

26305993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536871 (or 536864 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 37.

The square root of 26305993 is about 5128.9368294024. The cubic root of 26305993 is about 297.4072605975.

The spelling of 26305993 in words is "twenty-six million, three hundred five thousand, nine hundred ninety-three".