28784822 has 32 divisors (see below), whose sum is σ = 49593600. Its totient is φ = 12402720.

The previous prime is 28784803. The next prime is 28784827. The reversal of 28784822 is 22848782.

It is a self number, because there is not a number n which added to its sum of digits gives 28784822.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28784827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82304 + ... + 82652.

It is an arithmetic number, because the mean of its divisors is an integer number (1549800).

Almost surely, 2^28784822 is an apocalyptic number.

28784822 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28784822 is a deficient number, since it is larger than the sum of its proper divisors (20808778).

28784822 is a wasteful number, since it uses less digits than its factorization.

28784822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548.

The product of its digits is 114688, while the sum is 41.

The square root of 28784822 is about 5365.1488329775. The cubic root of 28784822 is about 306.4699160667.

The spelling of 28784822 in words is "twenty-eight million, seven hundred eighty-four thousand, eight hundred twenty-two".