28319850 has 144 divisors (see below), whose sum is σ = 84494592. Its totient is φ = 6756480.

The previous prime is 28319821. The next prime is 28319867. The reversal of 28319850 is 5891382.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 274899 + ... + 275001.

It is an arithmetic number, because the mean of its divisors is an integer number (586768).

Almost surely, 2^28319850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28319850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42247296).

28319850 is an abundant number, since it is smaller than the sum of its proper divisors (56174742).

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

28319850 is a wasteful number, since it uses less digits than its factorization.

28319850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 28319850 is about 5321.6397848783. The cubic root of 28319850 is about 304.8107757573.

The spelling of 28319850 in words is "twenty-eight million, three hundred nineteen thousand, eight hundred fifty".