28017738224 has 160 divisors (see below), whose sum is σ = 64948224000. Its totient is φ = 11699976960.

The previous prime is 28017738223. The next prime is 28017738251. The reversal of 28017738224 is 42283771082.

It is a Cunningham number, because it is equal to 167385²-1.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28017738223) 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, 42515207 + ... + 42515865.

It is an arithmetic number, because the mean of its divisors is an integer number (405926400).

Almost surely, 2^28017738224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28017738224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32474112000).

28017738224 is an abundant number, since it is smaller than the sum of its proper divisors (36930485776).

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

28017738224 is a wasteful number, since it uses less digits than its factorization.

28017738224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876 (or 856 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 44.

The spelling of 28017738224 in words is "twenty-eight billion, seventeen million, seven hundred thirty-eight thousand, two hundred twenty-four".