28863488920 has 32 divisors (see below), whose sum is σ = 74220400800. Its totient is φ = 9896053248.

The previous prime is 28863488887. The next prime is 28863488971. The reversal of 28863488920 is 2988436882.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51541665 + ... + 51542224.

It is an arithmetic number, because the mean of its divisors is an integer number (2319387525).

Almost surely, 2^28863488920 is an apocalyptic number.

28863488920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28863488920 is an abundant number, since it is smaller than the sum of its proper divisors (45356911880).

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

28863488920 is a wasteful number, since it uses less digits than its factorization.

28863488920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103083907 (or 103083903 counting only the distinct ones).

The product of its (nonzero) digits is 10616832, while the sum is 58.

The spelling of 28863488920 in words is "twenty-eight billion, eight hundred sixty-three million, four hundred eighty-eight thousand, nine hundred twenty".