28863872020 has 24 divisors (see below), whose sum is σ = 61518822624. Its totient is φ = 11373226656.

The previous prime is 28863872003. The next prime is 28863872029. The reversal of 28863872020 is 2027836882.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28863872029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10768762 + ... + 10771441.

It is an arithmetic number, because the mean of its divisors is an integer number (2563284276).

Almost surely, 2^28863872020 is an apocalyptic number.

28863872020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28863872020 is an abundant number, since it is smaller than the sum of its proper divisors (32654950604).

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

28863872020 is a wasteful number, since it uses less digits than its factorization.

28863872020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21540279 (or 21540277 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 46.

The spelling of 28863872020 in words is "twenty-eight billion, eight hundred sixty-three million, eight hundred seventy-two thousand, twenty".