26778255 has 24 divisors (see below), whose sum is σ = 49841712. Its totient is φ = 12241152.

The previous prime is 26778253. The next prime is 26778263. The reversal of 26778255 is 55287762.

It is not a de Polignac number, because 26778255 - 2¹ = 26778253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26778251) 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 23 ways as a sum of consecutive naturals, for example, 17482 + ... + 18951.

It is an arithmetic number, because the mean of its divisors is an integer number (2076738).

Almost surely, 2^26778255 is an apocalyptic number.

26778255 is a deficient number, since it is larger than the sum of its proper divisors (23063457).

26778255 is a wasteful number, since it uses less digits than its factorization.

26778255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36455 (or 36448 counting only the distinct ones).

The product of its digits is 235200, while the sum is 42.

The square root of 26778255 is about 5174.7710094264. The cubic root of 26778255 is about 299.1764635834.

The spelling of 26778255 in words is "twenty-six million, seven hundred seventy-eight thousand, two hundred fifty-five".