28016648 has 32 divisors (see below), whose sum is σ = 58397760. Its totient is φ = 12492480.

The previous prime is 28016633. The next prime is 28016657. The reversal of 28016648 is 84661082.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1661 + ... + 7667.

It is an arithmetic number, because the mean of its divisors is an integer number (1824930).

Almost surely, 2^28016648 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 28016648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29198880).

28016648 is an abundant number, since it is smaller than the sum of its proper divisors (30381112).

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

28016648 is a wasteful number, since it uses less digits than its factorization.

28016648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6077 (or 6073 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 28016648 is about 5293.0754765070. The cubic root of 28016648 is about 303.7190675654.

It can be divided in two parts, 2801 and 6648, that added together give a palindrome (9449).

The spelling of 28016648 in words is "twenty-eight million, sixteen thousand, six hundred forty-eight".