28302648 has 64 divisors (see below), whose sum is σ = 78865920. Its totient is φ = 8390400.

The previous prime is 28302607. The next prime is 28302653. The reversal of 28302648 is 84620382.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11268 + ... + 13548.

It is an arithmetic number, because the mean of its divisors is an integer number (1232280).

Almost surely, 2^28302648 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 28302648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39432960).

28302648 is an abundant number, since it is smaller than the sum of its proper divisors (50563272).

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

28302648 is a wasteful number, since it uses less digits than its factorization.

28302648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2348 (or 2344 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 28302648 is about 5320.0233082196. The cubic root of 28302648 is about 304.7490473587.

The spelling of 28302648 in words is "twenty-eight million, three hundred two thousand, six hundred forty-eight".