120043640 has 32 divisors (see below), whose sum is σ = 275849280. Its totient is φ = 46995072.

The previous prime is 120043633. The next prime is 120043657. The reversal of 120043640 is 46340021.

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, 30047 + ... + 33806.

It is an arithmetic number, because the mean of its divisors is an integer number (8620290).

Almost surely, 2^120043640 is an apocalyptic number.

120043640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120043640 is an abundant number, since it is smaller than the sum of its proper divisors (155805640).

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

120043640 is a wasteful number, since it uses less digits than its factorization.

120043640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63911 (or 63907 counting only the distinct ones).

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

The square root of 120043640 is about 10956.4428534082. The cubic root of 120043640 is about 493.3021995611.

Adding to 120043640 its reverse (46340021), we get a palindrome (166383661).

The spelling of 120043640 in words is "one hundred twenty million, forty-three thousand, six hundred forty".