28448111304 has 256 divisors, whose sum is σ = 89330688000. Its totient is φ = 8334627840.

The previous prime is 28448111297. The next prime is 28448111311. The reversal of 28448111304 is 40311184482.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28448111297) and next prime (28448111311).

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 4950657 + ... + 4956399.

It is an arithmetic number, because the mean of its divisors is an integer number (348948000).

Almost surely, 2^28448111304 is an apocalyptic number.

28448111304 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 28448111304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44665344000).

28448111304 is an abundant number, since it is smaller than the sum of its proper divisors (60882576696).

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

28448111304 is a wasteful number, since it uses less digits than its factorization.

28448111304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5865 (or 5855 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

Adding to 28448111304 its reverse (40311184482), we get a palindrome (68759295786).

The spelling of 28448111304 in words is "twenty-eight billion, four hundred forty-eight million, one hundred eleven thousand, three hundred four".