28235784 has 32 divisors (see below), whose sum is σ = 71388000. Its totient is φ = 9305472.

The previous prime is 28235719. The next prime is 28235791. The reversal of 28235784 is 48753282.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4474 + ... + 8745.

It is an arithmetic number, because the mean of its divisors is an integer number (2230875).

Almost surely, 2^28235784 is an apocalyptic number.

28235784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28235784 is an abundant number, since it is smaller than the sum of its proper divisors (43152216).

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

28235784 is a wasteful number, since it uses less digits than its factorization.

28235784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13317 (or 13313 counting only the distinct ones).

The product of its digits is 107520, while the sum is 39.

The square root of 28235784 is about 5313.7354092954. The cubic root of 28235784 is about 304.5088718595.

The spelling of 28235784 in words is "twenty-eight million, two hundred thirty-five thousand, seven hundred eighty-four".