28459919712 has 144 divisors (see below), whose sum is σ = 87590522880. Its totient is φ = 8067209472.

The previous prime is 28459919681. The next prime is 28459919713. The reversal of 28459919712 is 21791995482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28459919713) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 573589 + ... + 621227.

It is an arithmetic number, because the mean of its divisors is an integer number (608267520).

Almost surely, 2^28459919712 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 28459919712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43795261440).

28459919712 is an abundant number, since it is smaller than the sum of its proper divisors (59130603168).

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

28459919712 is a wasteful number, since it uses less digits than its factorization.

28459919712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47793 (or 47778 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 57.

The spelling of 28459919712 in words is "twenty-eight billion, four hundred fifty-nine million, nine hundred nineteen thousand, seven hundred twelve".