26317680 has 80 divisors (see below), whose sum is σ = 83164320. Its totient is φ = 6882304.

The previous prime is 26317631. The next prime is 26317757. The reversal of 26317680 is 8671362.

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 (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11686 + ... + 13754.

It is an arithmetic number, because the mean of its divisors is an integer number (1039554).

Almost surely, 2^26317680 is an apocalyptic number.

26317680 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 26317680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41582160).

26317680 is an abundant number, since it is smaller than the sum of its proper divisors (56846640).

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

26317680 is a wasteful number, since it uses less digits than its factorization.

26317680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2138 (or 2132 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 26317680 is about 5130.0760228285. The cubic root of 26317680 is about 297.4512972554.

The spelling of 26317680 in words is "twenty-six million, three hundred seventeen thousand, six hundred eighty".