26820445 has 4 divisors (see below), whose sum is σ = 32184540. Its totient is φ = 21456352.

The previous prime is 26820439. The next prime is 26820473. The reversal of 26820445 is 54402862.

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 8450649 + 18369796 = 2907^2 + 4286^2 .

It is a cyclic number.

It is not a de Polignac number, because 26820445 - 2⁷ = 26820317 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2682040 + ... + 2682049.

It is an arithmetic number, because the mean of its divisors is an integer number (8046135).

Almost surely, 2^26820445 is an apocalyptic number.

It is an amenable number.

26820445 is a deficient number, since it is larger than the sum of its proper divisors (5364095).

26820445 is an equidigital number, since it uses as much as digits as its factorization.

26820445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5364094.

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 26820445 is about 5178.8459139078. The cubic root of 26820445 is about 299.3335018454. Note that the first 3 decimals are identical.

The spelling of 26820445 in words is "twenty-six million, eight hundred twenty thousand, four hundred forty-five".