26989487 has 8 divisors (see below), whose sum is σ = 31268256. Its totient is φ = 22816512.

The previous prime is 26989483. The next prime is 26989507. The reversal of 26989487 is 78498962.

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

It is a cyclic number.

It is not a de Polignac number, because 26989487 - 2² = 26989483 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26989483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25898 + ... + 26919.

It is an arithmetic number, because the mean of its divisors is an integer number (3908532).

Almost surely, 2^26989487 is an apocalyptic number.

26989487 is a deficient number, since it is larger than the sum of its proper divisors (4278769).

26989487 is an equidigital number, since it uses as much as digits as its factorization.

26989487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52897.

The product of its digits is 1741824, while the sum is 53.

The square root of 26989487 is about 5195.1407103177. The cubic root of 26989487 is about 299.9610579082.

The spelling of 26989487 in words is "twenty-six million, nine hundred eighty-nine thousand, four hundred eighty-seven".