11805287728 has 40 divisors (see below), whose sum is σ = 24858218000. Its totient is φ = 5398596864.

The previous prime is 11805287719. The next prime is 11805287759. The reversal of 11805287728 is 82778250811.

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, 237678 + ... + 283021.

It is an arithmetic number, because the mean of its divisors is an integer number (621455450).

Almost surely, 2^11805287728 is an apocalyptic number.

It is an amenable number.

11805287728 is an abundant number, since it is smaller than the sum of its proper divisors (13052930272).

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

11805287728 is a wasteful number, since it uses less digits than its factorization.

11805287728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520829 (or 520823 counting only the distinct ones).

The product of its (nonzero) digits is 501760, while the sum is 49.

The spelling of 11805287728 in words is "eleven billion, eight hundred five million, two hundred eighty-seven thousand, seven hundred twenty-eight".