28337889 has 8 divisors (see below), whose sum is σ = 37871680. Its totient is φ = 18848016.

The previous prime is 28337887. The next prime is 28337899. The reversal of 28337889 is 98873382.

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

It is not a de Polignac number, because 28337889 - 2¹ = 28337887 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28337887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9442 + ... + 12075.

It is an arithmetic number, because the mean of its divisors is an integer number (4733960).

Almost surely, 2^28337889 is an apocalyptic number.

It is an amenable number.

28337889 is a deficient number, since it is larger than the sum of its proper divisors (9533791).

28337889 is a wasteful number, since it uses less digits than its factorization.

28337889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21959.

The product of its digits is 580608, while the sum is 48.

The square root of 28337889 is about 5323.3343873929. The cubic root of 28337889 is about 304.8754808379.

The spelling of 28337889 in words is "twenty-eight million, three hundred thirty-seven thousand, eight hundred eighty-nine".