26920805 has 8 divisors (see below), whose sum is σ = 33093144. Its totient is φ = 21011200.

The previous prime is 26920769. The next prime is 26920807. The reversal of 26920805 is 50802962.

It can be written as a sum of positive squares in 4 ways, for example, as 2010724 + 24910081 = 1418^2 + 4991^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 26920805 - 2¹⁸ = 26658661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26920807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65456 + ... + 65865.

It is an arithmetic number, because the mean of its divisors is an integer number (4136643).

Almost surely, 2^26920805 is an apocalyptic number.

It is an amenable number.

26920805 is a deficient number, since it is larger than the sum of its proper divisors (6172339).

26920805 is a wasteful number, since it uses less digits than its factorization.

26920805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131367.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 26920805 is about 5188.5262840232. The cubic root of 26920805 is about 299.7063979384.

The spelling of 26920805 in words is "twenty-six million, nine hundred twenty thousand, eight hundred five".