28785344 has 84 divisors (see below), whose sum is σ = 67930776. Its totient is φ = 12063744.

The previous prime is 28785331. The next prime is 28785347. The reversal of 28785344 is 44358782.

It is not an unprimeable number, because it can be changed into a prime (28785347) 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, 210044 + ... + 210180.

Almost surely, 2^28785344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28785344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33965388).

28785344 is an abundant number, since it is smaller than the sum of its proper divisors (39145432).

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

28785344 is a wasteful number, since it uses less digits than its factorization.

28785344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230 (or 213 counting only the distinct ones).

The product of its digits is 215040, while the sum is 41.

The square root of 28785344 is about 5365.1974800561. The cubic root of 28785344 is about 306.4717686209.

The spelling of 28785344 in words is "twenty-eight million, seven hundred eighty-five thousand, three hundred forty-four".