26885557 has 2 divisors, whose sum is σ = 26885558. Its totient is φ = 26885556.

The previous prime is 26885543. The next prime is 26885561. The reversal of 26885557 is 75558862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18740241 + 8145316 = 4329^2 + 2854^2 .

It is a cyclic number.

It is not a de Polignac number, because 26885557 - 2⁷ = 26885429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26885527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13442778 + 13442779.

It is an arithmetic number, because the mean of its divisors is an integer number (13442779).

Almost surely, 2^26885557 is an apocalyptic number.

It is an amenable number.

26885557 is a deficient number, since it is larger than the sum of its proper divisors (1).

26885557 is an equidigital number, since it uses as much as digits as its factorization.

26885557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672000, while the sum is 46.

The square root of 26885557 is about 5185.1284458536. The cubic root of 26885557 is about 299.5755367568.

The spelling of 26885557 in words is "twenty-six million, eight hundred eighty-five thousand, five hundred fifty-seven".