28869548920 has 32 divisors (see below), whose sum is σ = 68777456400. Its totient is φ = 10868535808.

The previous prime is 28869548861. The next prime is 28869548947. The reversal of 28869548920 is 2984596882.

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, 21226930 + ... + 21228289.

Almost surely, 2^28869548920 is an apocalyptic number.

28869548920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28869548920 is an abundant number, since it is smaller than the sum of its proper divisors (39907907480).

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

28869548920 is a wasteful number, since it uses less digits than its factorization.

28869548920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42455247 (or 42455243 counting only the distinct ones).

The product of its (nonzero) digits is 19906560, while the sum is 61.

The spelling of 28869548920 in words is "twenty-eight billion, eight hundred sixty-nine million, five hundred forty-eight thousand, nine hundred twenty".