28284036 has 72 divisors (see below), whose sum is σ = 74318496. Its totient is φ = 8302080.

The previous prime is 28284031. The next prime is 28284037. The reversal of 28284036 is 63048282.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 28283988 and 28284006.

It is not an unprimeable number, because it can be changed into a prime (28284031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 291540 + ... + 291636.

Almost surely, 2^28284036 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 28284036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37159248).

28284036 is an abundant number, since it is smaller than the sum of its proper divisors (46034460).

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

28284036 is a wasteful number, since it uses less digits than its factorization.

28284036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209 (or 160 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 28284036 is about 5318.2737800907. The cubic root of 28284036 is about 304.6822310779.

The spelling of 28284036 in words is "twenty-eight million, two hundred eighty-four thousand, thirty-six".