28231782 has 8 divisors (see below), whose sum is σ = 56463576. Its totient is φ = 9410592.

The previous prime is 28231769. The next prime is 28231817. The reversal of 28231782 is 28713282.

It is a sphenic number, since it is the product of 3 distinct primes.

28231782 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2352643 + ... + 2352654.

It is an arithmetic number, because the mean of its divisors is an integer number (7057947).

Almost surely, 2^28231782 is an apocalyptic number.

28231782 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28231782 is a wasteful number, since it uses less digits than its factorization.

28231782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4705302.

The product of its digits is 10752, while the sum is 33.

The square root of 28231782 is about 5313.3588246984. The cubic root of 28231782 is about 304.4944846540.

The spelling of 28231782 in words is "twenty-eight million, two hundred thirty-one thousand, seven hundred eighty-two".