26828257 has 2 divisors, whose sum is σ = 26828258. Its totient is φ = 26828256.

The previous prime is 26828239. The next prime is 26828267. The reversal of 26828257 is 75282862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23126481 + 3701776 = 4809^2 + 1924^2 .

It is a cyclic number.

It is not a de Polignac number, because 26828257 - 2⁷ = 26828129 is a prime.

It is not a weakly prime, because it can be changed into another prime (26828267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13414128 + 13414129.

It is an arithmetic number, because the mean of its divisors is an integer number (13414129).

Almost surely, 2^26828257 is an apocalyptic number.

It is an amenable number.

26828257 is a deficient number, since it is larger than the sum of its proper divisors (1).

26828257 is an equidigital number, since it uses as much as digits as its factorization.

26828257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107520, while the sum is 40.

The square root of 26828257 is about 5179.6000810873. The cubic root of 26828257 is about 299.3625613473.

The spelling of 26828257 in words is "twenty-six million, eight hundred twenty-eight thousand, two hundred fifty-seven".