28469826 has 128 divisors (see below), whose sum is σ = 81285120. Its totient is φ = 7171200.

The previous prime is 28469821. The next prime is 28469839. The reversal of 28469826 is 62896482.

It is not an unprimeable number, because it can be changed into a prime (28469821) 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 63 ways as a sum of consecutive naturals, for example, 170395 + ... + 170561.

It is an arithmetic number, because the mean of its divisors is an integer number (635040).

Almost surely, 2^28469826 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28469826, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40642560).

28469826 is an abundant number, since it is smaller than the sum of its proper divisors (52815294).

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

28469826 is a wasteful number, since it uses less digits than its factorization.

28469826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237 (or 231 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 28469826 is about 5335.7123235797. The cubic root of 28469826 is about 305.3479000676.

The spelling of 28469826 in words is "twenty-eight million, four hundred sixty-nine thousand, eight hundred twenty-six".