28213065500 has 24 divisors (see below), whose sum is σ = 61617336144. Its totient is φ = 11285226000.

The previous prime is 28213065493. The next prime is 28213065539. The reversal of 28213065500 is 556031282.

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, 28212566 + ... + 28213565.

It is an arithmetic number, because the mean of its divisors is an integer number (2567389006).

Almost surely, 2^28213065500 is an apocalyptic number.

28213065500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28213065500 is an abundant number, since it is smaller than the sum of its proper divisors (33404270644).

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

28213065500 is a wasteful number, since it uses less digits than its factorization.

28213065500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56426150 (or 56426138 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 28213065500 its reverse (556031282), we get a palindrome (28769096782).

The spelling of 28213065500 in words is "twenty-eight billion, two hundred thirteen million, sixty-five thousand, five hundred".