28304774784 has 640 divisors, whose sum is σ = 104875404480. Its totient is φ = 7445053440.

The previous prime is 28304774783. The next prime is 28304774803. The reversal of 28304774784 is 48747740382.

28304774784 is a `hidden beast` number, since 28 + 30 + 477 + 47 + 84 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 28304774784.

It is not an unprimeable number, because it can be changed into a prime (28304774783) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 25204047 + ... + 25205169.

Almost surely, 2^28304774784 is an apocalyptic number.

28304774784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28304774784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52437702240).

28304774784 is an abundant number, since it is smaller than the sum of its proper divisors (76570629696).

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

28304774784 is a wasteful number, since it uses less digits than its factorization.

28304774784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190 (or 1169 counting only the distinct ones).

The product of its (nonzero) digits is 8429568, while the sum is 54.

The spelling of 28304774784 in words is "twenty-eight billion, three hundred four million, seven hundred seventy-four thousand, seven hundred eighty-four".