28350781450 has 24 divisors (see below), whose sum is σ = 52749084780. Its totient is φ = 11336736000.

The previous prime is 28350781399. The next prime is 28350781453. The reversal of 28350781450 is 5418705382.

It can be written as a sum of positive squares in 6 ways, for example, as 5964936289 + 22385845161 = 77233^2 + 149619^2 .

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28350781397 and 28350781406.

It is not an unprimeable number, because it can be changed into a prime (28350781453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73650 + ... + 249250.

Almost surely, 2^28350781450 is an apocalyptic number.

28350781450 is a deficient number, since it is larger than the sum of its proper divisors (24398303330).

28350781450 is a wasteful number, since it uses less digits than its factorization.

28350781450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178842 (or 178837 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 43.

The spelling of 28350781450 in words is "twenty-eight billion, three hundred fifty million, seven hundred eighty-one thousand, four hundred fifty".