28008834 has 64 divisors (see below), whose sum is σ = 66355200. Its totient is φ = 7717248.

The previous prime is 28008833. The next prime is 28008853. The reversal of 28008834 is 43880082.

It is a junction number, because it is equal to n+sod(n) for n = 28008795 and 28008804.

It is not an unprimeable number, because it can be changed into a prime (28008833) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 220479 + ... + 220605.

It is an arithmetic number, because the mean of its divisors is an integer number (1036800).

Almost surely, 2^28008834 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28008834, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33177600).

28008834 is an abundant number, since it is smaller than the sum of its proper divisors (38346366).

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

28008834 is a wasteful number, since it uses less digits than its factorization.

28008834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287.

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 28008834 is about 5292.3372908385. The cubic root of 28008834 is about 303.6908286237.

The spelling of 28008834 in words is "twenty-eight million, eight thousand, eight hundred thirty-four".