28576516212 has 144 divisors (see below), whose sum is σ = 75191996880. Its totient is φ = 9143414784.

The previous prime is 28576516183. The next prime is 28576516229. The reversal of 28576516212 is 21261567582.

28576516212 is a `hidden beast` number, since 2 + 8 + 576 + 5 + 1 + 62 + 12 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 243547236 + 28332968976 = 15606^2 + 168324^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 56142214 + ... + 56142722.

It is an arithmetic number, because the mean of its divisors is an integer number (522166645).

Almost surely, 2^28576516212 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 28576516212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37595998440).

28576516212 is an abundant number, since it is smaller than the sum of its proper divisors (46615480668).

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

28576516212 is a wasteful number, since it uses less digits than its factorization.

28576516212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042 (or 1037 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The spelling of 28576516212 in words is "twenty-eight billion, five hundred seventy-six million, five hundred sixteen thousand, two hundred twelve".