28285056 has 96 divisors (see below), whose sum is σ = 83431920. Its totient is φ = 9192960.

The previous prime is 28285031. The next prime is 28285069. The reversal of 28285056 is 65058282.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 28285056.

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 11 ways as a sum of consecutive naturals, for example, 49251 + ... + 49821.

Almost surely, 2^28285056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28285056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41715960).

28285056 is an abundant number, since it is smaller than the sum of its proper divisors (55146864).

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

28285056 is a wasteful number, since it uses less digits than its factorization.

28285056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634 (or 619 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 28285056 is about 5318.3696750038. The cubic root of 28285056 is about 304.6858935931.

The spelling of 28285056 in words is "twenty-eight million, two hundred eighty-five thousand, fifty-six".