120389985 has 48 divisors (see below), whose sum is σ = 221457600. Its totient is φ = 60331392.

The previous prime is 120389963. The next prime is 120389987. The reversal of 120389985 is 589983021.

It is a happy number.

It is not a de Polignac number, because 120389985 - 2⁹ = 120389473 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 120389985.

It is not an unprimeable number, because it can be changed into a prime (120389987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 118339 + ... + 119351.

It is an arithmetic number, because the mean of its divisors is an integer number (4613700).

Almost surely, 2^120389985 is an apocalyptic number.

120389985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

120389985 is a deficient number, since it is larger than the sum of its proper divisors (101067615).

120389985 is a wasteful number, since it uses less digits than its factorization.

120389985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1182 (or 1179 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The square root of 120389985 is about 10972.2370098353. The cubic root of 120389985 is about 493.7761624763.

The spelling of 120389985 in words is "one hundred twenty million, three hundred eighty-nine thousand, nine hundred eighty-five".