28280008250 has 64 divisors (see below), whose sum is σ = 57161613600. Its totient is φ = 10414540800.

The previous prime is 28280008223. The next prime is 28280008277. The reversal of 28280008250 is 5280008282.

It is an interprime number because it is at equal distance from previous prime (28280008223) and next prime (28280008277).

It can be written as a sum of positive squares in 16 ways, for example, as 8165110321 + 20114897929 = 90361^2 + 141827^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28280008250.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1253066 + ... + 1275434.

Almost surely, 2^28280008250 is an apocalyptic number.

28280008250 is an abundant number, since it is smaller than the sum of its proper divisors (28881605350).

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

28280008250 is a wasteful number, since it uses less digits than its factorization.

28280008250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22788 (or 22778 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 35.

The spelling of 28280008250 in words is "twenty-eight billion, two hundred eighty million, eight thousand, two hundred fifty".