28310568 has 128 divisors (see below), whose sum is σ = 85034880. Its totient is φ = 7741440.

The previous prime is 28310567. The next prime is 28310609. The reversal of 28310568 is 86501382.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (28310561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 250480 + ... + 250592.

It is an arithmetic number, because the mean of its divisors is an integer number (664335).

Almost surely, 2^28310568 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 28310568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42517440).

28310568 is an abundant number, since it is smaller than the sum of its proper divisors (56724312).

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

28310568 is a wasteful number, since it uses less digits than its factorization.

28310568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219 (or 215 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 28310568 is about 5320.7676137941. The cubic root of 28310568 is about 304.7774709342. Note that the first 3 decimals are identical.

The spelling of 28310568 in words is "twenty-eight million, three hundred ten thousand, five hundred sixty-eight".