26680560 has 80 divisors (see below), whose sum is σ = 87077760. Its totient is φ = 6739200.

The previous prime is 26680559. The next prime is 26680601. The reversal of 26680560 is 6508662.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1635 + ... + 7485.

It is an arithmetic number, because the mean of its divisors is an integer number (1088472).

Almost surely, 2^26680560 is an apocalyptic number.

26680560 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 26680560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43538880).

26680560 is an abundant number, since it is smaller than the sum of its proper divisors (60397200).

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

26680560 is a wasteful number, since it uses less digits than its factorization.

26680560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5886 (or 5880 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 26680560 is about 5165.3228359900. The cubic root of 26680560 is about 298.8121921374.

The spelling of 26680560 in words is "twenty-six million, six hundred eighty thousand, five hundred sixty".