28321046364 has 72 divisors (see below), whose sum is σ = 71747477760. Its totient is φ = 8690939712.

The previous prime is 28321046363. The next prime is 28321046399. The reversal of 28321046364 is 46364012382.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28321046363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 750189 + ... + 787035.

Almost surely, 2^28321046364 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 28321046364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35873738880).

28321046364 is an abundant number, since it is smaller than the sum of its proper divisors (43426431396).

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

28321046364 is a wasteful number, since it uses less digits than its factorization.

28321046364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37259 (or 37244 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 39.

The spelling of 28321046364 in words is "twenty-eight billion, three hundred twenty-one million, forty-six thousand, three hundred sixty-four".