26081604 has 72 divisors (see below), whose sum is σ = 73513440. Its totient is φ = 7748352.

The previous prime is 26081603. The next prime is 26081611. The reversal of 26081604 is 40618062.

It is not an unprimeable number, because it can be changed into a prime (26081603) 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, 10507 + ... + 12749.

It is an arithmetic number, because the mean of its divisors is an integer number (1021020).

Almost surely, 2^26081604 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 26081604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36756720).

26081604 is an abundant number, since it is smaller than the sum of its proper divisors (47431836).

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

26081604 is a wasteful number, since it uses less digits than its factorization.

26081604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2289 (or 2284 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 26081604 is about 5107.0151752271. The cubic root of 26081604 is about 296.5592210043.

Adding to 26081604 its reverse (40618062), we get a palindrome (66699666).

The spelling of 26081604 in words is "twenty-six million, eighty-one thousand, six hundred four".