28532712648 has 64 divisors (see below), whose sum is σ = 77831507520. Its totient is φ = 8644608000.

The previous prime is 28532712643. The next prime is 28532712673. The reversal of 28532712648 is 84621723582.

It is a junction number, because it is equal to n+sod(n) for n = 28532712597 and 28532712606.

It is not an unprimeable number, because it can be changed into a prime (28532712643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2529036 + ... + 2540292.

It is an arithmetic number, because the mean of its divisors is an integer number (1216117305).

Almost surely, 2^28532712648 is an apocalyptic number.

It is an amenable number.

28532712648 is an abundant number, since it is smaller than the sum of its proper divisors (49298794872).

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

28532712648 is a wasteful number, since it uses less digits than its factorization.

28532712648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20878 (or 20874 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 48.

The spelling of 28532712648 in words is "twenty-eight billion, five hundred thirty-two million, seven hundred twelve thousand, six hundred forty-eight".