28285810 has 32 divisors (see below), whose sum is σ = 58419072. Its totient is φ = 9659520.

The previous prime is 28285801. The next prime is 28285811. The reversal of 28285810 is 1858282.

It is a happy number.

It is a super-3 number, since 3×28285810³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (28285811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21265 + ... + 22555.

It is an arithmetic number, because the mean of its divisors is an integer number (1825596).

Almost surely, 2^28285810 is an apocalyptic number.

28285810 is an abundant number, since it is smaller than the sum of its proper divisors (30133262).

28285810 is a wasteful number, since it uses less digits than its factorization.

28285810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1618.

The product of its (nonzero) digits is 10240, while the sum is 34.

The square root of 28285810 is about 5318.4405609163. The cubic root of 28285810 is about 304.6886009252.

The spelling of 28285810 in words is "twenty-eight million, two hundred eighty-five thousand, eight hundred ten".