180857868 has 24 divisors (see below), whose sum is σ = 422372160. Its totient is φ = 60233040.

The previous prime is 180857843. The next prime is 180857881. The reversal of 180857868 is 868758081.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 180857868.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9123 + ... + 21093.

It is an arithmetic number, because the mean of its divisors is an integer number (17598840).

Almost surely, 2^180857868 is an apocalyptic number.

It is an amenable number.

180857868 is an abundant number, since it is smaller than the sum of its proper divisors (241514292).

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

180857868 is a wasteful number, since it uses less digits than its factorization.

180857868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13237 (or 13235 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 51.

The square root of 180857868 is about 13448.3407154935. The cubic root of 180857868 is about 565.5171790982.

The spelling of 180857868 in words is "one hundred eighty million, eight hundred fifty-seven thousand, eight hundred sixty-eight".