28428828648 has 64 divisors (see below), whose sum is σ = 77669841600. Its totient is φ = 8599610880.

The previous prime is 28428828613. The next prime is 28428828653. The reversal of 28428828648 is 84682882482.

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

It is a junction number, because it is equal to n+sod(n) for n = 28428828591 and 28428828600.

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, 55590 + ... + 244842.

It is an arithmetic number, because the mean of its divisors is an integer number (1213591275).

Almost surely, 2^28428828648 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 28428828648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38834920800).

28428828648 is an abundant number, since it is smaller than the sum of its proper divisors (49241012952).

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

28428828648 is a wasteful number, since it uses less digits than its factorization.

28428828648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189842 (or 189838 counting only the distinct ones).

The product of its digits is 25165824, while the sum is 60.

The spelling of 28428828648 in words is "twenty-eight billion, four hundred twenty-eight million, eight hundred twenty-eight thousand, six hundred forty-eight".