287857138360812 has 12 divisors (see below), whose sum is σ = 671666656175256. Its totient is φ = 95952379453600.

The previous prime is 287857138360793. The next prime is 287857138360817. The reversal of 287857138360812 is 218063831758782.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (287857138360817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11994047431689 + ... + 11994047431712.

It is an arithmetic number, because the mean of its divisors is an integer number (55972221347938).

Almost surely, 2^{287857138360812} is an apocalyptic number.

It is an amenable number.

287857138360812 is an abundant number, since it is smaller than the sum of its proper divisors (383809517814444).

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

287857138360812 is a wasteful number, since it uses less digits than its factorization.

287857138360812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23988094863408 (or 23988094863406 counting only the distinct ones).

The product of its (nonzero) digits is 216760320, while the sum is 69.

The spelling of 287857138360812 in words is "two hundred eighty-seven trillion, eight hundred fifty-seven billion, one hundred thirty-eight million, three hundred sixty thousand, eight hundred twelve".