28313885205 has 32 divisors (see below), whose sum is σ = 50613937920. Its totient is φ = 15017296320.

The previous prime is 28313885191. The next prime is 28313885209. The reversal of 28313885205 is 50258831382.

It is not a de Polignac number, because 28313885205 - 2⁴ = 28313885189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28313885209) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 554937 + ... + 603806.

It is an arithmetic number, because the mean of its divisors is an integer number (1581685560).

Almost surely, 2^28313885205 is an apocalyptic number.

It is an amenable number.

28313885205 is a deficient number, since it is larger than the sum of its proper divisors (22300052715).

28313885205 is a wasteful number, since it uses less digits than its factorization.

28313885205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158938 (or 1158932 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 45.

The spelling of 28313885205 in words is "twenty-eight billion, three hundred thirteen million, eight hundred eighty-five thousand, two hundred five".