120644140 has 48 divisors (see below), whose sum is σ = 261382464. Its totient is φ = 46745600.

The previous prime is 120644119. The next prime is 120644171. The reversal of 120644140 is 41446021.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136500 + ... + 137380.

It is an arithmetic number, because the mean of its divisors is an integer number (5445468).

Almost surely, 2^120644140 is an apocalyptic number.

120644140 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 120644140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130691232).

120644140 is an abundant number, since it is smaller than the sum of its proper divisors (140738324).

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

120644140 is a wasteful number, since it uses less digits than its factorization.

120644140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098 (or 1096 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 120644140 is about 10983.8126349642. The cubic root of 120644140 is about 494.1233881275.

The spelling of 120644140 in words is "one hundred twenty million, six hundred forty-four thousand, one hundred forty".