28512871829 has 16 divisors (see below), whose sum is σ = 31704228864. Its totient is φ = 25464499200.

The previous prime is 28512871823. The next prime is 28512871843. The reversal of 28512871829 is 92817821582.

It is a cyclic number.

It is not a de Polignac number, because 28512871829 - 2⁴ = 28512871813 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28512871823) 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, 3345077 + ... + 3353589.

It is an arithmetic number, because the mean of its divisors is an integer number (1981514304).

Almost surely, 2^28512871829 is an apocalyptic number.

It is an amenable number.

28512871829 is a deficient number, since it is larger than the sum of its proper divisors (3191357035).

28512871829 is a wasteful number, since it uses less digits than its factorization.

28512871829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16868.

The product of its digits is 1290240, while the sum is 53.

The spelling of 28512871829 in words is "twenty-eight billion, five hundred twelve million, eight hundred seventy-one thousand, eight hundred twenty-nine".