28819284 has 48 divisors (see below), whose sum is σ = 76684608. Its totient is φ = 8345088.

The previous prime is 28819283. The next prime is 28819289. The reversal of 28819284 is 48291882.

It is a super-2 number, since 2×28819284² = 1661102260545312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28819283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2782 + ... + 8085.

It is an arithmetic number, because the mean of its divisors is an integer number (1597596).

Almost surely, 2^28819284 is an apocalyptic number.

It is an amenable number.

28819284 is an abundant number, since it is smaller than the sum of its proper divisors (47865324).

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

28819284 is a wasteful number, since it uses less digits than its factorization.

28819284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10904 (or 10902 counting only the distinct ones).

The product of its digits is 73728, while the sum is 42.

The square root of 28819284 is about 5368.3595259632. The cubic root of 28819284 is about 306.5921720966.

The spelling of 28819284 in words is "twenty-eight million, eight hundred nineteen thousand, two hundred eighty-four".