28285440700 has 36 divisors (see below), whose sum is σ = 66959354952. Its totient is φ = 10285614400.

The previous prime is 28285440683. The next prime is 28285440709. The reversal of 28285440700 is 704458282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28285440709) 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 11 ways as a sum of consecutive naturals, for example, 12855919 + ... + 12858118.

It is an arithmetic number, because the mean of its divisors is an integer number (1859982082).

Almost surely, 2^28285440700 is an apocalyptic number.

28285440700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28285440700 is an abundant number, since it is smaller than the sum of its proper divisors (38673914252).

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

28285440700 is a wasteful number, since it uses less digits than its factorization.

28285440700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25714062 (or 25714055 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 40.

Adding to 28285440700 its reverse (704458282), we get a palindrome (28989898982).

The spelling of 28285440700 in words is "twenty-eight billion, two hundred eighty-five million, four hundred forty thousand, seven hundred".