28110448820 has 48 divisors (see below), whose sum is σ = 60869346048. Its totient is φ = 10896624000.

The previous prime is 28110448819. The next prime is 28110448841. The reversal of 28110448820 is 2884401182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110069 + ... + 261411.

It is an arithmetic number, because the mean of its divisors is an integer number (1268111376).

Almost surely, 2^28110448820 is an apocalyptic number.

28110448820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28110448820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30434673024).

28110448820 is an abundant number, since it is smaller than the sum of its proper divisors (32758897228).

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

28110448820 is a wasteful number, since it uses less digits than its factorization.

28110448820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151640 (or 151638 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 38.

The spelling of 28110448820 in words is "twenty-eight billion, one hundred ten million, four hundred forty-eight thousand, eight hundred twenty".