26780449 has 2 divisors, whose sum is σ = 26780450. Its totient is φ = 26780448.

The previous prime is 26780437. The next prime is 26780483. The reversal of 26780449 is 94408762.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25200400 + 1580049 = 5020^2 + 1257^2 .

It is a cyclic number.

It is not a de Polignac number, because 26780449 - 2¹³ = 26772257 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26780549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13390224 + 13390225.

It is an arithmetic number, because the mean of its divisors is an integer number (13390225).

Almost surely, 2^26780449 is an apocalyptic number.

It is an amenable number.

26780449 is a deficient number, since it is larger than the sum of its proper divisors (1).

26780449 is an equidigital number, since it uses as much as digits as its factorization.

26780449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 26780449 is about 5174.9829951411. The cubic root of 26780449 is about 299.1846340839.

The spelling of 26780449 in words is "twenty-six million, seven hundred eighty thousand, four hundred forty-nine".