28605838236 has 48 divisors (see below), whose sum is σ = 68353469184. Its totient is φ = 9306130176.

The previous prime is 28605838229. The next prime is 28605838237. The reversal of 28605838236 is 63283850682.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28605838237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 647881 + ... + 690623.

It is an arithmetic number, because the mean of its divisors is an integer number (1424030608).

Almost surely, 2^28605838236 is an apocalyptic number.

It is an amenable number.

28605838236 is an abundant number, since it is smaller than the sum of its proper divisors (39747630948).

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

28605838236 is a wasteful number, since it uses less digits than its factorization.

28605838236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44090 (or 44088 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 51.

The spelling of 28605838236 in words is "twenty-eight billion, six hundred five million, eight hundred thirty-eight thousand, two hundred thirty-six".