28784916 has 48 divisors (see below), whose sum is σ = 74954880. Its totient is φ = 9552960.

The previous prime is 28784909. The next prime is 28784923. The reversal of 28784916 is 61948782.

It is an interprime number because it is at equal distance from previous prime (28784909) and next prime (28784923).

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 15 ways as a sum of consecutive naturals, for example, 33160 + ... + 34016.

It is an arithmetic number, because the mean of its divisors is an integer number (1561560).

Almost surely, 2^28784916 is an apocalyptic number.

It is an amenable number.

28784916 is an abundant number, since it is smaller than the sum of its proper divisors (46169964).

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

28784916 is a wasteful number, since it uses less digits than its factorization.

28784916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1181 (or 1173 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 28784916 is about 5365.1575932120. The cubic root of 28784916 is about 306.4702496700.

The spelling of 28784916 in words is "twenty-eight million, seven hundred eighty-four thousand, nine hundred sixteen".