26881689 has 8 divisors (see below), whose sum is σ = 36171520. Its totient is φ = 17756496.

The previous prime is 26881667. The next prime is 26881693. The reversal of 26881689 is 98618862.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 26881689 - 2²¹ = 24784537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26882689) 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 7 ways as a sum of consecutive naturals, for example, 40777 + ... + 41430.

It is an arithmetic number, because the mean of its divisors is an integer number (4521440).

Almost surely, 2^26881689 is an apocalyptic number.

It is an amenable number.

26881689 is a deficient number, since it is larger than the sum of its proper divisors (9289831).

26881689 is a wasteful number, since it uses less digits than its factorization.

26881689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82319.

The product of its digits is 331776, while the sum is 48.

The square root of 26881689 is about 5184.7554426414. The cubic root of 26881689 is about 299.5611695168.

The spelling of 26881689 in words is "twenty-six million, eight hundred eighty-one thousand, six hundred eighty-nine".