120630640 has 80 divisors (see below), whose sum is σ = 319854528. Its totient is φ = 41914368.

The previous prime is 120630637. The next prime is 120630647. The reversal of 120630640 is 46036021.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120630647) 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 15 ways as a sum of consecutive naturals, for example, 14269 + ... + 21091.

Almost surely, 2^120630640 is an apocalyptic number.

120630640 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 120630640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159927264).

120630640 is an abundant number, since it is smaller than the sum of its proper divisors (199223888).

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

120630640 is a wasteful number, since it uses less digits than its factorization.

120630640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6866 (or 6860 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 120630640 is about 10983.1980770630. The cubic root of 120630640 is about 494.1049567458.

Adding to 120630640 its reverse (46036021), we get a palindrome (166666661).

The spelling of 120630640 in words is "one hundred twenty million, six hundred thirty thousand, six hundred forty".