26780255 has 4 divisors (see below), whose sum is σ = 32136312. Its totient is φ = 21424200.

The previous prime is 26780239. The next prime is 26780263. The reversal of 26780255 is 55208762.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 26780255 - 2⁴ = 26780239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2678021 + ... + 2678030.

It is an arithmetic number, because the mean of its divisors is an integer number (8034078).

Almost surely, 2^26780255 is an apocalyptic number.

26780255 is a deficient number, since it is larger than the sum of its proper divisors (5356057).

26780255 is an equidigital number, since it uses as much as digits as its factorization.

26780255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5356056.

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 26780255 is about 5174.9642510843. The cubic root of 26780255 is about 299.1839116420.

The spelling of 26780255 in words is "twenty-six million, seven hundred eighty thousand, two hundred fifty-five".