28447798032 has 240 divisors, whose sum is σ = 88004367360. Its totient is φ = 8538317568.

The previous prime is 28447798021. The next prime is 28447798033. The reversal of 28447798032 is 23089774482.

It is a happy number.

28447798032 is a `hidden beast` number, since 2 + 84 + 477 + 98 + 0 + 3 + 2 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 28447798032.

It is not an unprimeable number, because it can be changed into a prime (28447798033) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10507623 + ... + 10510329.

It is an arithmetic number, because the mean of its divisors is an integer number (366684864).

Almost surely, 2^28447798032 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 28447798032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44002183680).

28447798032 is an abundant number, since it is smaller than the sum of its proper divisors (59556569328).

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

28447798032 is a wasteful number, since it uses less digits than its factorization.

28447798032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2930 (or 2921 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 54.

The spelling of 28447798032 in words is "twenty-eight billion, four hundred forty-seven million, seven hundred ninety-eight thousand, thirty-two".