26505216 has 78 divisors (see below), whose sum is σ = 76667760. Its totient is φ = 8822784.

The previous prime is 26505173. The next prime is 26505221. The reversal of 26505216 is 61250562.

26505216 is a `hidden beast` number, since 2 + 650 + 5 + 2 + 1 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 26505216.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36505 + ... + 37223.

It is an arithmetic number, because the mean of its divisors is an integer number (982920).

Almost surely, 2^26505216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26505216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38333880).

26505216 is an abundant number, since it is smaller than the sum of its proper divisors (50162544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26505216 is an equidigital number, since it uses as much as digits as its factorization.

26505216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749 (or 724 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 26505216 is about 5148.3216682721. The cubic root of 26505216 is about 298.1561573649.

Adding to 26505216 its reverse (61250562), we get a palindrome (87755778).

The spelling of 26505216 in words is "twenty-six million, five hundred five thousand, two hundred sixteen".