26820049 has 4 divisors (see below), whose sum is σ = 26835364. Its totient is φ = 26804736.

The previous prime is 26820019. The next prime is 26820097. The reversal of 26820049 is 94002862.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8910225 + 17909824 = 2985^2 + 4232^2 .

It is a cyclic number.

It is not a de Polignac number, because 26820049 - 2¹⁵ = 26787281 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26820049.

It is not an unprimeable number, because it can be changed into a prime (26820019) 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, 4632 + ... + 8665.

It is an arithmetic number, because the mean of its divisors is an integer number (6708841).

Almost surely, 2^26820049 is an apocalyptic number.

It is an amenable number.

26820049 is a deficient number, since it is larger than the sum of its proper divisors (15315).

26820049 is a wasteful number, since it uses less digits than its factorization.

26820049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15314.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 26820049 is about 5178.8076813104. The cubic root of 26820049 is about 299.3320286328.

The spelling of 26820049 in words is "twenty-six million, eight hundred twenty thousand, forty-nine".