28784798 has 16 divisors (see below), whose sum is σ = 49836384. Its totient is φ = 12213600.

The previous prime is 28784773. The next prime is 28784801. The reversal of 28784798 is 89748782.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8765 + ... + 11592.

It is an arithmetic number, because the mean of its divisors is an integer number (3114774).

Almost surely, 2^28784798 is an apocalyptic number.

28784798 is a deficient number, since it is larger than the sum of its proper divisors (21051586).

28784798 is a wasteful number, since it uses less digits than its factorization.

28784798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20467.

The product of its digits is 1806336, while the sum is 53.

The square root of 28784798 is about 5365.1465963196. The cubic root of 28784798 is about 306.4698308912.

The spelling of 28784798 in words is "twenty-eight million, seven hundred eighty-four thousand, seven hundred ninety-eight".