28305899118 has 256 divisors, whose sum is σ = 77027328000. Its totient is φ = 7530931584.

The previous prime is 28305899093. The next prime is 28305899119. The reversal of 28305899118 is 81199850382.

28305899118 is a `hidden beast` number, since 28 + 30 + 589 + 9 + 1 + 1 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28305899119) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 71299296 + ... + 71299692.

It is an arithmetic number, because the mean of its divisors is an integer number (300888000).

Almost surely, 2^28305899118 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28305899118, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38513664000).

28305899118 is an abundant number, since it is smaller than the sum of its proper divisors (48721428882).

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

28305899118 is a wasteful number, since it uses less digits than its factorization.

28305899118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636 (or 630 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 54.

The spelling of 28305899118 in words is "twenty-eight billion, three hundred five million, eight hundred ninety-nine thousand, one hundred eighteen".