28389006 has 24 divisors (see below), whose sum is σ = 61635600. Its totient is φ = 9443616.

The previous prime is 28388989. The next prime is 28389007. The reversal of 28389006 is 60098382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28389007) 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 11 ways as a sum of consecutive naturals, for example, 9466 + ... + 12098.

It is an arithmetic number, because the mean of its divisors is an integer number (2568150).

Almost surely, 2^28389006 is an apocalyptic number.

28389006 is an abundant number, since it is smaller than the sum of its proper divisors (33246594).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28389006 is a wasteful number, since it uses less digits than its factorization.

28389006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3240 (or 3237 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 28389006 is about 5328.1334442748. The cubic root of 28389006 is about 305.0586861900.

The spelling of 28389006 in words is "twenty-eight million, three hundred eighty-nine thousand, six".