26781312 has 64 divisors (see below), whose sum is σ = 71971200. Its totient is φ = 8822784.

The previous prime is 26781311. The next prime is 26781319. The reversal of 26781312 is 21318762.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 26781312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26781311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36889 + ... + 37607.

It is an arithmetic number, because the mean of its divisors is an integer number (1124550).

Almost surely, 2^26781312 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 26781312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35985600).

26781312 is an abundant number, since it is smaller than the sum of its proper divisors (45189888).

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

26781312 is an equidigital number, since it uses as much as digits as its factorization.

26781312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833 (or 821 counting only the distinct ones).

The product of its digits is 4032, while the sum is 30.

The square root of 26781312 is about 5175.0663763859. The cubic root of 26781312 is about 299.1878477911.

The spelling of 26781312 in words is "twenty-six million, seven hundred eighty-one thousand, three hundred twelve".