28748809224 has 128 divisors (see below), whose sum is σ = 82033344000. Its totient is φ = 9324260352.

The previous prime is 28748809223. The next prime is 28748809241. The reversal of 28748809224 is 42290884782.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (28748809223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1748112 + ... + 1764480.

It is an arithmetic number, because the mean of its divisors is an integer number (640885500).

Almost surely, 2^28748809224 is an apocalyptic number.

28748809224 is a gapful number since it is divisible by the number (24) 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 28748809224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41016672000).

28748809224 is an abundant number, since it is smaller than the sum of its proper divisors (53284534776).

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

28748809224 is a wasteful number, since it uses less digits than its factorization.

28748809224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16604 (or 16594 counting only the distinct ones).

The product of its (nonzero) digits is 4128768, while the sum is 54.

The spelling of 28748809224 in words is "twenty-eight billion, seven hundred forty-eight million, eight hundred nine thousand, two hundred twenty-four".