120331920 has 40 divisors (see below), whose sum is σ = 373029696. Its totient is φ = 32088448.

The previous prime is 120331919. The next prime is 120331927. The reversal of 120331920 is 29133021.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (120331927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250452 + ... + 250931.

Almost surely, 2^120331920 is an apocalyptic number.

120331920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120331920 is an abundant number, since it is smaller than the sum of its proper divisors (252697776).

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

120331920 is a wasteful number, since it uses less digits than its factorization.

120331920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501399 (or 501393 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 120331920 is about 10969.5906942784. The cubic root of 120331920 is about 493.6967657183.

Adding to 120331920 its reverse (29133021), we get a palindrome (149464941).

The spelling of 120331920 in words is "one hundred twenty million, three hundred thirty-one thousand, nine hundred twenty".