26278859 has 4 divisors (see below), whose sum is σ = 26290704. Its totient is φ = 26267016.

The previous prime is 26278853. The next prime is 26278867. The reversal of 26278859 is 95887262.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 26278859 - 2²⁴ = 9501643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26278853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1487 + ... + 7400.

It is an arithmetic number, because the mean of its divisors is an integer number (6572676).

Almost surely, 2^26278859 is an apocalyptic number.

26278859 is a deficient number, since it is larger than the sum of its proper divisors (11845).

26278859 is an equidigital number, since it uses as much as digits as its factorization.

26278859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11844.

The product of its digits is 483840, while the sum is 47.

The square root of 26278859 is about 5126.2909593584. The cubic root of 26278859 is about 297.3049692702.

The spelling of 26278859 in words is "twenty-six million, two hundred seventy-eight thousand, eight hundred fifty-nine".