28827445920 has 384 divisors, whose sum is σ = 114788814336. Its totient is φ = 5917556736.

The previous prime is 28827445891. The next prime is 28827445931. The reversal of 28827445920 is 2954472882.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1607242 + ... + 1625078.

It is an arithmetic number, because the mean of its divisors is an integer number (298929204).

Almost surely, 2^28827445920 is an apocalyptic number.

28827445920 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 28827445920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57394407168).

28827445920 is an abundant number, since it is smaller than the sum of its proper divisors (85961368416).

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

28827445920 is a wasteful number, since it uses less digits than its factorization.

28827445920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17912 (or 17904 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 51.

The spelling of 28827445920 in words is "twenty-eight billion, eight hundred twenty-seven million, four hundred forty-five thousand, nine hundred twenty".