28302784 has 28 divisors (see below), whose sum is σ = 56701944. Its totient is φ = 14015744.

The previous prime is 28302779. The next prime is 28302787. The reversal of 28302784 is 48720382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28302787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4782 + ... + 8914.

Almost surely, 2^28302784 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 28302784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28350972).

28302784 is an abundant number, since it is smaller than the sum of its proper divisors (28399160).

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

28302784 is a wasteful number, since it uses less digits than its factorization.

28302784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4252 (or 4242 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 28302784 is about 5320.0360901031. The cubic root of 28302784 is about 304.7495354851.

The spelling of 28302784 in words is "twenty-eight million, three hundred two thousand, seven hundred eighty-four".