120403640 has 32 divisors (see below), whose sum is σ = 309610080. Its totient is φ = 41281152.

The previous prime is 120403609. The next prime is 120403667. The reversal of 120403640 is 46304021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214727 + ... + 215286.

It is an arithmetic number, because the mean of its divisors is an integer number (9675315).

Almost surely, 2^120403640 is an apocalyptic number.

120403640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120403640 is an abundant number, since it is smaller than the sum of its proper divisors (189206440).

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

120403640 is a wasteful number, since it uses less digits than its factorization.

120403640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430031 (or 430027 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 120403640 is about 10972.8592445178. The cubic root of 120403640 is about 493.7948303043.

Adding to 120403640 its reverse (46304021), we get a palindrome (166707661).

The spelling of 120403640 in words is "one hundred twenty million, four hundred three thousand, six hundred forty".