120323640 has 64 divisors (see below), whose sum is σ = 364383360. Its totient is φ = 31783040.

The previous prime is 120323611. The next prime is 120323641. The reversal of 120323640 is 46323021.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120323641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8155 + ... + 17525.

It is an arithmetic number, because the mean of its divisors is an integer number (5693490).

Almost surely, 2^120323640 is an apocalyptic number.

120323640 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 120323640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182191680).

120323640 is an abundant number, since it is smaller than the sum of its proper divisors (244059720).

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

120323640 is a wasteful number, since it uses less digits than its factorization.

120323640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9492 (or 9488 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 120323640 is about 10969.2132808146. The cubic root of 120323640 is about 493.6854417543.

Adding to 120323640 its reverse (46323021), we get a palindrome (166646661).

The spelling of 120323640 in words is "one hundred twenty million, three hundred twenty-three thousand, six hundred forty".