26540 has 12 divisors (see below), whose sum is σ = 55776. Its totient is φ = 10608.

The previous prime is 26539. The next prime is 26557. The reversal of 26540 is 4562.

It is a plaindrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 644 + ... + 683.

It is an arithmetic number, because the mean of its divisors is an integer number (4648).

2²⁶⁵⁴⁰ is an apocalyptic number.

26540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26540 is an abundant number, since it is smaller than the sum of its proper divisors (29236).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27888).

26540 is a wasteful number, since it uses less digits than its factorization.

26540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336 (or 1334 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 26540 is about 162.9110186574. The cubic root of 26540 is about 29.8286528311.

The spelling of 26540 in words is "twenty-six thousand, five hundred forty".