26956865 has 8 divisors (see below), whose sum is σ = 34836648. Its totient is φ = 19906560.

The previous prime is 26956859. The next prime is 26956871. The reversal of 26956865 is 56865962.

It is a Cunningham number, because it is equal to 5192²+1.

It is an interprime number because it is at equal distance from previous prime (26956859) and next prime (26956871).

It can be written as a sum of positive squares in 4 ways, for example, as 3984016 + 22972849 = 1996^2 + 4793^2 .

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

It is not a de Polignac number, because 26956865 - 2¹⁶ = 26891329 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 207296 + ... + 207425.

It is an arithmetic number, because the mean of its divisors is an integer number (4354581).

Almost surely, 2^26956865 is an apocalyptic number.

It is an amenable number.

26956865 is a deficient number, since it is larger than the sum of its proper divisors (7879783).

26956865 is a wasteful number, since it uses less digits than its factorization.

26956865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414739.

The product of its digits is 777600, while the sum is 47.

The square root of 26956865 is about 5192.0000963020. Note that the first 4 decimals coincide. The cubic root of 26956865 is about 299.8401555884.

The spelling of 26956865 in words is "twenty-six million, nine hundred fifty-six thousand, eight hundred sixty-five".