28816488 has 96 divisors (see below), whose sum is σ = 83140200. Its totient is φ = 8999424.

The previous prime is 28816477. The next prime is 28816511. The reversal of 28816488 is 88461882.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 28323684 + 492804 = 5322^2 + 702^2 .

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77070 + ... + 77442.

Almost surely, 2^28816488 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 28816488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41570100).

28816488 is an abundant number, since it is smaller than the sum of its proper divisors (54323712).

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

28816488 is a wasteful number, since it uses less digits than its factorization.

28816488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451 (or 444 counting only the distinct ones).

The product of its digits is 196608, while the sum is 45.

The square root of 28816488 is about 5368.0991048974. The cubic root of 28816488 is about 306.5822567515.

The spelling of 28816488 in words is "twenty-eight million, eight hundred sixteen thousand, four hundred eighty-eight".