26820989 has 8 divisors (see below), whose sum is σ = 30404640. Its totient is φ = 23454576.

The previous prime is 26820979. The next prime is 26820991. The reversal of 26820989 is 98902862.

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 26820989 - 2¹² = 26816893 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26820979) 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, 54047 + ... + 54540.

It is an arithmetic number, because the mean of its divisors is an integer number (3800580).

Almost surely, 2^26820989 is an apocalyptic number.

It is an amenable number.

26820989 is a deficient number, since it is larger than the sum of its proper divisors (3583651).

26820989 is a wasteful number, since it uses less digits than its factorization.

26820989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108619.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 26820989 is about 5178.8984349956. The cubic root of 26820989 is about 299.3355256289.

The spelling of 26820989 in words is "twenty-six million, eight hundred twenty thousand, nine hundred eighty-nine".