26820449 has 8 divisors (see below), whose sum is σ = 27821928. Its totient is φ = 25833600.

The previous prime is 26820439. The next prime is 26820473. The reversal of 26820449 is 94402862.

It can be written as a sum of positive squares in 4 ways, for example, as 22848400 + 3972049 = 4780^2 + 1993^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 26820449 - 2²⁰ = 25771873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26820439) 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, 149 + ... + 7325.

It is an arithmetic number, because the mean of its divisors is an integer number (3477741).

Almost surely, 2^26820449 is an apocalyptic number.

It is an amenable number.

26820449 is a deficient number, since it is larger than the sum of its proper divisors (1001479).

26820449 is a wasteful number, since it uses less digits than its factorization.

26820449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7315.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 26820449 is about 5178.8463000943. The cubic root of 26820449 is about 299.3335167263. Note that the first 3 decimals are identical.

The spelling of 26820449 in words is "twenty-six million, eight hundred twenty thousand, four hundred forty-nine".