26561872 has 40 divisors (see below), whose sum is σ = 54371520. Its totient is φ = 12545280.

The previous prime is 26561863. The next prime is 26561879. The reversal of 26561872 is 27816562.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26561879) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 32347 + ... + 33157.

It is an arithmetic number, because the mean of its divisors is an integer number (1359288).

Almost surely, 2^26561872 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 26561872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27185760).

26561872 is an abundant number, since it is smaller than the sum of its proper divisors (27809648).

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

26561872 is a wasteful number, since it uses less digits than its factorization.

26561872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931 (or 925 counting only the distinct ones).

The product of its digits is 40320, while the sum is 37.

The square root of 26561872 is about 5153.8211067130. The cubic root of 26561872 is about 298.3684465674.

The spelling of 26561872 in words is "twenty-six million, five hundred sixty-one thousand, eight hundred seventy-two".