26540840 has 64 divisors (see below), whose sum is σ = 62380800. Its totient is φ = 10153728.

The previous prime is 26540837. The next prime is 26540851. The reversal of 26540840 is 4804562.

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, 116807 + ... + 117033.

It is an arithmetic number, because the mean of its divisors is an integer number (974700).

Almost surely, 2^26540840 is an apocalyptic number.

26540840 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 26540840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31190400).

26540840 is an abundant number, since it is smaller than the sum of its proper divisors (35839960).

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

26540840 is a wasteful number, since it uses less digits than its factorization.

26540840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354 (or 350 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 26540840 is about 5151.7802748176. The cubic root of 26540840 is about 298.2896752346.

The spelling of 26540840 in words is "twenty-six million, five hundred forty thousand, eight hundred forty".