28913822784 has 252 divisors, whose sum is σ = 105172477488. Its totient is φ = 7510003200.

The previous prime is 28913822771. The next prime is 28913822837. The reversal of 28913822784 is 48722831982.

28913822784 is a `hidden beast` number, since 289 + 13 + 82 + 278 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (252).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 28913822784.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 263899 + ... + 357029.

Almost surely, 2^28913822784 is an apocalyptic number.

28913822784 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 28913822784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52586238744).

28913822784 is an abundant number, since it is smaller than the sum of its proper divisors (76258654704).

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

28913822784 is a wasteful number, since it uses less digits than its factorization.

28913822784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93174 (or 93154 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 54.

The spelling of 28913822784 in words is "twenty-eight billion, nine hundred thirteen million, eight hundred twenty-two thousand, seven hundred eighty-four".