120171816 has 32 divisors (see below), whose sum is σ = 333811200. Its totient is φ = 40057200.

The previous prime is 120171811. The next prime is 120171817. The reversal of 120171816 is 618171021.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 120171816.

It is not an unprimeable number, because it can be changed into a prime (120171811) by changing a digit.

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, 277960 + ... + 278391.

It is an arithmetic number, because the mean of its divisors is an integer number (10431600).

Almost surely, 2^120171816 is an apocalyptic number.

It is an amenable number.

120171816 is an abundant number, since it is smaller than the sum of its proper divisors (213639384).

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

120171816 is a wasteful number, since it uses less digits than its factorization.

120171816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556366 (or 556356 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 27.

The square root of 120171816 is about 10962.2906365413. The cubic root of 120171816 is about 493.4777107661.

The spelling of 120171816 in words is "one hundred twenty million, one hundred seventy-one thousand, eight hundred sixteen".