28920549344 has 48 divisors (see below), whose sum is σ = 60040083600. Its totient is φ = 13674968064.

The previous prime is 28920549323. The next prime is 28920549407. The reversal of 28920549344 is 44394502982.

It is a junction number, because it is equal to n+sod(n) for n = 28920549292 and 28920549301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304154 + ... + 387750.

It is an arithmetic number, because the mean of its divisors is an integer number (1250835075).

Almost surely, 2^28920549344 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 28920549344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30020041800).

28920549344 is an abundant number, since it is smaller than the sum of its proper divisors (31119534256).

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

28920549344 is a wasteful number, since it uses less digits than its factorization.

28920549344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84195 (or 84187 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 50.

The spelling of 28920549344 in words is "twenty-eight billion, nine hundred twenty million, five hundred forty-nine thousand, three hundred forty-four".