26581340 has 12 divisors (see below), whose sum is σ = 55820856. Its totient is φ = 10632528.

The previous prime is 26581337. The next prime is 26581351. The reversal of 26581340 is 4318562.

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 3 ways as a sum of consecutive naturals, for example, 664514 + ... + 664553.

It is an arithmetic number, because the mean of its divisors is an integer number (4651738).

Almost surely, 2^26581340 is an apocalyptic number.

26581340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26581340 is an abundant number, since it is smaller than the sum of its proper divisors (29239516).

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

26581340 is a wasteful number, since it uses less digits than its factorization.

26581340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1329076 (or 1329074 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 26581340 is about 5155.7094565152. The cubic root of 26581340 is about 298.4413231878.

The spelling of 26581340 in words is "twenty-six million, five hundred eighty-one thousand, three hundred forty".