26808621 has 16 divisors (see below), whose sum is σ = 41000064. Its totient is φ = 15263424.

The previous prime is 26808611. The next prime is 26808637. The reversal of 26808621 is 12680862.

It is not a de Polignac number, because 26808621 - 2¹⁰ = 26807597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26808611) by changing a digit.

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, 3975 + ... + 8331.

It is an arithmetic number, because the mean of its divisors is an integer number (2562504).

Almost surely, 2^26808621 is an apocalyptic number.

26808621 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

26808621 is a deficient number, since it is larger than the sum of its proper divisors (14191443).

26808621 is a wasteful number, since it uses less digits than its factorization.

26808621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4660.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 26808621 is about 5177.7042209844. The cubic root of 26808621 is about 299.2895075522.

The spelling of 26808621 in words is "twenty-six million, eight hundred eight thousand, six hundred twenty-one".