26678889 has 20 divisors (see below), whose sum is σ = 40423680. Its totient is φ = 17531640.

The previous prime is 26678867. The next prime is 26678891. The reversal of 26678889 is 98887662.

It is not a de Polignac number, because 26678889 - 2⁷ = 26678761 is a prime.

It is a Curzon number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (26678809) 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 19 ways as a sum of consecutive naturals, for example, 3432 + ... + 8070.

It is an arithmetic number, because the mean of its divisors is an integer number (2021184).

Almost surely, 2^26678889 is an apocalyptic number.

It is an amenable number.

26678889 is a deficient number, since it is larger than the sum of its proper divisors (13744791).

26678889 is an equidigital number, since it uses as much as digits as its factorization.

26678889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4722 (or 4713 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 26678889 is about 5165.1610817089. The cubic root of 26678889 is about 298.8059538176.

The spelling of 26678889 in words is "twenty-six million, six hundred seventy-eight thousand, eight hundred eighty-nine".