28320813582 has 16 divisors (see below), whose sum is σ = 56713608192. Its totient is φ = 9428274360.

The previous prime is 28320813571. The next prime is 28320813593. The reversal of 28320813582 is 28531802382.

It is an interprime number because it is at equal distance from previous prime (28320813571) and next prime (28320813593).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2994094 + ... + 3003537.

It is an arithmetic number, because the mean of its divisors is an integer number (3544600512).

Almost surely, 2^28320813582 is an apocalyptic number.

28320813582 is an abundant number, since it is smaller than the sum of its proper divisors (28392794610).

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

28320813582 is a wasteful number, since it uses less digits than its factorization.

28320813582 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5998423.

The product of its (nonzero) digits is 184320, while the sum is 42.

The spelling of 28320813582 in words is "twenty-eight billion, three hundred twenty million, eight hundred thirteen thousand, five hundred eighty-two".