26873857 has 4 divisors (see below), whose sum is σ = 26894340. Its totient is φ = 26853376.

The previous prime is 26873813. The next prime is 26873863. The reversal of 26873857 is 75837862.

It is a Cunningham number, because it is equal to 72⁴+1.

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 341056 + 26532801 = 584^2 + 5151^2 .

It is a cyclic number.

It is not a de Polignac number, because 26873857 - 2²³ = 18485249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26873887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8128 + ... + 10945.

It is an arithmetic number, because the mean of its divisors is an integer number (6723585).

Almost surely, 2^26873857 is an apocalyptic number.

It is an amenable number.

26873857 is a deficient number, since it is larger than the sum of its proper divisors (20483).

26873857 is a wasteful number, since it uses less digits than its factorization.

26873857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20482.

The product of its digits is 564480, while the sum is 46.

The square root of 26873857 is about 5184.0000964506. Note that the first 4 decimals coincide. The cubic root of 26873857 is about 299.5320742348.

It can be divided in two parts, 26873 and 857, that added together give a triangular number (27730 = T₂₃₅).

The spelling of 26873857 in words is "twenty-six million, eight hundred seventy-three thousand, eight hundred fifty-seven".