26780725 has 6 divisors (see below), whose sum is σ = 33208130. Its totient is φ = 21424560.

The previous prime is 26780693. The next prime is 26780759. The reversal of 26780725 is 52708762.

It can be written as a sum of positive squares in 3 ways, for example, as 9591409 + 17189316 = 3097^2 + 4146^2 .

It is not a de Polignac number, because 26780725 - 2⁵ = 26780693 is a prime.

It is a congruent 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 5 ways as a sum of consecutive naturals, for example, 535590 + ... + 535639.

Almost surely, 2^26780725 is an apocalyptic number.

26780725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

26780725 is a deficient number, since it is larger than the sum of its proper divisors (6427405).

26780725 is a wasteful number, since it uses less digits than its factorization.

26780725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1071239 (or 1071234 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 26780725 is about 5175.0096618267. The cubic root of 26780725 is about 299.1856618819.

The spelling of 26780725 in words is "twenty-six million, seven hundred eighty thousand, seven hundred twenty-five".