28250670648 has 64 divisors (see below), whose sum is σ = 70913232000. Its totient is φ = 9378760832.

The previous prime is 28250670647. The next prime is 28250670659. The reversal of 28250670648 is 84607605282.

It is a junction number, because it is equal to n+sod(n) for n = 28250670597 and 28250670606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28250670641) 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, 7719043 + ... + 7722701.

It is an arithmetic number, because the mean of its divisors is an integer number (1108019250).

Almost surely, 2^28250670648 is an apocalyptic number.

It is an amenable number.

28250670648 is an abundant number, since it is smaller than the sum of its proper divisors (42662561352).

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

28250670648 is a wasteful number, since it uses less digits than its factorization.

28250670648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4884 (or 4880 counting only the distinct ones).

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

The spelling of 28250670648 in words is "twenty-eight billion, two hundred fifty million, six hundred seventy thousand, six hundred forty-eight".