120685680 has 160 divisors (see below), whose sum is σ = 423187200. Its totient is φ = 31603968.

The previous prime is 120685661. The next prime is 120685709. The reversal of 120685680 is 86586021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 126967 + ... + 127913.

It is an arithmetic number, because the mean of its divisors is an integer number (2644920).

Almost surely, 2^120685680 is an apocalyptic number.

120685680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 120685680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211593600).

120685680 is an abundant number, since it is smaller than the sum of its proper divisors (302501520).

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

120685680 is a wasteful number, since it uses less digits than its factorization.

120685680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028 (or 1016 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 120685680 is about 10985.7034367400. The cubic root of 120685680 is about 494.1800935483.

The spelling of 120685680 in words is "one hundred twenty million, six hundred eighty-five thousand, six hundred eighty".