26728965 has 12 divisors (see below), whose sum is σ = 46330284. Its totient is φ = 14255424.

The previous prime is 26728957. The next prime is 26728969. The reversal of 26728965 is 56982762.

It can be written as a sum of positive squares in 2 ways, for example, as 10131489 + 16597476 = 3183^2 + 4074^2 .

It is not a de Polignac number, because 26728965 - 2³ = 26728957 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 593977 = 26728965 / (2 + 6 + 7 + 2 + 8 + 9 + 6 + 5).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 26728965.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26728969) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 296944 + ... + 297033.

It is an arithmetic number, because the mean of its divisors is an integer number (3860857).

Almost surely, 2^26728965 is an apocalyptic number.

It is an amenable number.

26728965 is a deficient number, since it is larger than the sum of its proper divisors (19601319).

26728965 is a wasteful number, since it uses less digits than its factorization.

26728965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593988 (or 593985 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 26728965 is about 5170.0062862631. The cubic root of 26728965 is about 298.9927888702.

The spelling of 26728965 in words is "twenty-six million, seven hundred twenty-eight thousand, nine hundred sixty-five".