28478584512 has 168 divisors, whose sum is σ = 93436720416. Its totient is φ = 8123940864.

The previous prime is 28478584493. The next prime is 28478584513. The reversal of 28478584512 is 21548587482.

28478584512 is a `hidden beast` number, since 2 + 8 + 4 + 7 + 8 + 584 + 51 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (168).

It is a super-2 number, since 2×28478584512² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28478584513) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2724448 + ... + 2734880.

Almost surely, 2^28478584512 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 28478584512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46718360208).

28478584512 is an abundant number, since it is smaller than the sum of its proper divisors (64958135904).

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

28478584512 is a wasteful number, since it uses less digits than its factorization.

28478584512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11135 (or 11122 counting only the distinct ones).

The product of its digits is 5734400, while the sum is 54.

The spelling of 28478584512 in words is "twenty-eight billion, four hundred seventy-eight million, five hundred eighty-four thousand, five hundred twelve".