28310640500 has 24 divisors (see below), whose sum is σ = 61830439944. Its totient is φ = 11324256000.

The previous prime is 28310640487. The next prime is 28310640503. The reversal of 28310640500 is 504601382.

It can be written as a sum of positive squares in 4 ways, for example, as 7568304016 + 20742336484 = 86996^2 + 144022^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28310640503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28310141 + ... + 28311140.

It is an arithmetic number, because the mean of its divisors is an integer number (2576268331).

Almost surely, 2^28310640500 is an apocalyptic number.

28310640500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28310640500 is an abundant number, since it is smaller than the sum of its proper divisors (33519799444).

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

28310640500 is a wasteful number, since it uses less digits than its factorization.

28310640500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56621300 (or 56621288 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The spelling of 28310640500 in words is "twenty-eight billion, three hundred ten million, six hundred forty thousand, five hundred".