26866540 has 12 divisors (see below), whose sum is σ = 56419776. Its totient is φ = 10746608.

The previous prime is 26866537. The next prime is 26866549. The reversal of 26866540 is 4566862.

It is a self number, because there is not a number n which added to its sum of digits gives 26866540.

It is not an unprimeable number, because it can be changed into a prime (26866549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 671644 + ... + 671683.

It is an arithmetic number, because the mean of its divisors is an integer number (4701648).

Almost surely, 2^26866540 is an apocalyptic number.

26866540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26866540 is an abundant number, since it is smaller than the sum of its proper divisors (29553236).

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

26866540 is a wasteful number, since it uses less digits than its factorization.

26866540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343336 (or 1343334 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 26866540 is about 5183.2943192530. The cubic root of 26866540 is about 299.5048870304.

The spelling of 26866540 in words is "twenty-six million, eight hundred sixty-six thousand, five hundred forty".