28384774 has 16 divisors (see below), whose sum is σ = 46530000. Its totient is φ = 12879360.

The previous prime is 28384753. The next prime is 28384787. The reversal of 28384774 is 47748382.

It is a self number, because there is not a number n which added to its sum of digits gives 28384774.

It is a congruent number.

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, 22102 + ... + 23350.

It is an arithmetic number, because the mean of its divisors is an integer number (2908125).

Almost surely, 2^28384774 is an apocalyptic number.

28384774 is a deficient number, since it is larger than the sum of its proper divisors (18145226).

28384774 is a wasteful number, since it uses less digits than its factorization.

28384774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2295.

The product of its digits is 301056, while the sum is 43.

The square root of 28384774 is about 5327.7362922727. The cubic root of 28384774 is about 305.0435268884.

The spelling of 28384774 in words is "twenty-eight million, three hundred eighty-four thousand, seven hundred seventy-four".