28321061824 has 56 divisors (see below), whose sum is σ = 61440657408. Its totient is φ = 12845495040.

The previous prime is 28321061777. The next prime is 28321061911. The reversal of 28321061824 is 42816012382.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285697 + ... + 371839.

Almost surely, 2^28321061824 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 28321061824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30720328704).

28321061824 is an abundant number, since it is smaller than the sum of its proper divisors (33119595584).

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

28321061824 is a wasteful number, since it uses less digits than its factorization.

28321061824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86633 (or 86623 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 37.

The spelling of 28321061824 in words is "twenty-eight billion, three hundred twenty-one million, sixty-one thousand, eight hundred twenty-four".