26689985 has 8 divisors (see below), whose sum is σ = 36603456. Its totient is φ = 18301680.

The previous prime is 26689969. The next prime is 26689991. The reversal of 26689985 is 58998662.

It is a happy number.

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

It is not a de Polignac number, because 26689985 - 2⁴ = 26689969 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 381251 + ... + 381320.

It is an arithmetic number, because the mean of its divisors is an integer number (4575432).

Almost surely, 2^26689985 is an apocalyptic number.

It is an amenable number.

26689985 is a deficient number, since it is larger than the sum of its proper divisors (9913471).

26689985 is an equidigital number, since it uses as much as digits as its factorization.

26689985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762583.

The product of its digits is 1866240, while the sum is 53.

The square root of 26689985 is about 5166.2350895018. The cubic root of 26689985 is about 298.8473734748.

The spelling of 26689985 in words is "twenty-six million, six hundred eighty-nine thousand, nine hundred eighty-five".