28880016 has 80 divisors (see below), whose sum is σ = 82494720. Its totient is φ = 8632960.

The previous prime is 28880009. The next prime is 28880029. The reversal of 28880016 is 61008882.

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

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 15 ways as a sum of consecutive naturals, for example, 43495 + ... + 44153.

It is an arithmetic number, because the mean of its divisors is an integer number (1031184).

Almost surely, 2^28880016 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 28880016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41247360).

28880016 is an abundant number, since it is smaller than the sum of its proper divisors (53614704).

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

28880016 is a wasteful number, since it uses less digits than its factorization.

28880016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764 (or 758 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 28880016 is about 5374.0130256634. The cubic root of 28880016 is about 306.8073855346.

Adding to 28880016 its reverse (61008882), we get a palindrome (89888898).

The spelling of 28880016 in words is "twenty-eight million, eight hundred eighty thousand, sixteen".