28001128433 has 2 divisors, whose sum is σ = 28001128434. Its totient is φ = 28001128432.

The previous prime is 28001128429. The next prime is 28001128439. The reversal of 28001128433 is 33482110082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18650818624 + 9350309809 = 136568^2 + 96697^2 .

It is a cyclic number.

It is not a de Polignac number, because 28001128433 - 2² = 28001128429 is a prime.

It is a super-2 number, since 2×28001128433² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28001128433.

It is not a weakly prime, because it can be changed into another prime (28001128439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14000564216 + 14000564217.

It is an arithmetic number, because the mean of its divisors is an integer number (14000564217).

Almost surely, 2^28001128433 is an apocalyptic number.

It is an amenable number.

28001128433 is a deficient number, since it is larger than the sum of its proper divisors (1).

28001128433 is an equidigital number, since it uses as much as digits as its factorization.

28001128433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 32.

The spelling of 28001128433 in words is "twenty-eight billion, one million, one hundred twenty-eight thousand, four hundred thirty-three".