28798427616 has 192 divisors, whose sum is σ = 89334153216. Its totient is φ = 7949145600.

The previous prime is 28798427599. The next prime is 28798427663. The reversal of 28798427616 is 61672489782.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28798427616.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23393721 + ... + 23394951.

It is an arithmetic number, because the mean of its divisors is an integer number (465282048).

Almost surely, 2^28798427616 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 28798427616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44667076608).

28798427616 is an abundant number, since it is smaller than the sum of its proper divisors (60535725600).

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

28798427616 is a wasteful number, since it uses less digits than its factorization.

28798427616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2405 (or 2397 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 60.

The spelling of 28798427616 in words is "twenty-eight billion, seven hundred ninety-eight million, four hundred twenty-seven thousand, six hundred sixteen".