26507889 has 6 divisors (see below), whose sum is σ = 38289186. Its totient is φ = 17671920.

The previous prime is 26507863. The next prime is 26507893. The reversal of 26507889 is 98870562.

It can be written as a sum of positive squares in only one way, i.e., 26471025 + 36864 = 5145^2 + 192^2 .

It is not a de Polignac number, because 26507889 - 2⁸ = 26507633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26507809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1472652 + ... + 1472669.

It is an arithmetic number, because the mean of its divisors is an integer number (6381531).

Almost surely, 2^26507889 is an apocalyptic number.

It is an amenable number.

26507889 is a deficient number, since it is larger than the sum of its proper divisors (11781297).

26507889 is a wasteful number, since it uses less digits than its factorization.

26507889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2945327 (or 2945324 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 26507889 is about 5148.5812608912. The cubic root of 26507889 is about 298.1661798528.

The spelling of 26507889 in words is "twenty-six million, five hundred seven thousand, eight hundred eighty-nine".