28146784 has 24 divisors (see below), whose sum is σ = 56042280. Its totient is φ = 13913856.

The previous prime is 28146761. The next prime is 28146793. The reversal of 28146784 is 48764182.

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, 2094 + ... + 7789.

It is an arithmetic number, because the mean of its divisors is an integer number (2335095).

Almost surely, 2^28146784 is an apocalyptic number.

It is an amenable number.

28146784 is a deficient number, since it is larger than the sum of its proper divisors (27895496).

28146784 is an equidigital number, since it uses as much as digits as its factorization.

28146784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9982 (or 9974 counting only the distinct ones).

The product of its digits is 86016, while the sum is 40.

The square root of 28146784 is about 5305.3542765776. The cubic root of 28146784 is about 304.1885948871.

The spelling of 28146784 in words is "twenty-eight million, one hundred forty-six thousand, seven hundred eighty-four".