26081720 has 64 divisors (see below), whose sum is σ = 68472000. Its totient is φ = 8937600.

The previous prime is 26081719. The next prime is 26081749. The reversal of 26081720 is 2718062.

It is a super-2 number, since 2×26081720² = 1360512236316800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26081720.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12770 + ... + 14670.

It is an arithmetic number, because the mean of its divisors is an integer number (1069875).

Almost surely, 2^26081720 is an apocalyptic number.

26081720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26081720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34236000).

26081720 is an abundant number, since it is smaller than the sum of its proper divisors (42390280).

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

26081720 is a wasteful number, since it uses less digits than its factorization.

26081720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1933 (or 1915 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 26081720 is about 5107.0265321418. The cubic root of 26081720 is about 296.5596606605.

Adding to 26081720 its reverse (2718062), we get a palindrome (28799782).

The spelling of 26081720 in words is "twenty-six million, eighty-one thousand, seven hundred twenty".