26397965 has 12 divisors (see below), whose sum is σ = 34819932. Its totient is φ = 19198080.

The previous prime is 26397953. The next prime is 26397979. The reversal of 26397965 is 56979362.

It can be written as a sum of positive squares in 2 ways, for example, as 18028516 + 8369449 = 4246^2 + 2893^2 .

It is not a de Polignac number, because 26397965 - 2⁴ = 26397949 is a prime.

It is a super-2 number, since 2×26397965² = 1393705112282450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21212 + ... + 22421.

It is an arithmetic number, because the mean of its divisors is an integer number (2901661).

Almost surely, 2^26397965 is an apocalyptic number.

It is an amenable number.

26397965 is a deficient number, since it is larger than the sum of its proper divisors (8421967).

26397965 is a wasteful number, since it uses less digits than its factorization.

26397965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43660 (or 43649 counting only the distinct ones).

The product of its digits is 612360, while the sum is 47.

The square root of 26397965 is about 5137.8949969808. The cubic root of 26397965 is about 297.7534595879.

The spelling of 26397965 in words is "twenty-six million, three hundred ninety-seven thousand, nine hundred sixty-five".