28001128533 has 48 divisors (see below), whose sum is σ = 46990503936. Its totient is φ = 14499349920.

The previous prime is 28001128501. The next prime is 28001128549. The reversal of 28001128533 is 33582110082.

It is not a de Polignac number, because 28001128533 - 2⁵ = 28001128501 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28001128494 and 28001128503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28001128433) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 94068 + ... + 254658.

It is an arithmetic number, because the mean of its divisors is an integer number (978968832).

Almost surely, 2^28001128533 is an apocalyptic number.

28001128533 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

28001128533 is a deficient number, since it is larger than the sum of its proper divisors (18989375403).

28001128533 is a wasteful number, since it uses less digits than its factorization.

28001128533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160662 (or 160643 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The spelling of 28001128533 in words is "twenty-eight billion, one million, one hundred twenty-eight thousand, five hundred thirty-three".