40312120 has 32 divisors (see below), whose sum is σ = 91857600. Its totient is φ = 15919488.

The previous prime is 40312109. The next prime is 40312141. The reversal of 40312120 is 2121304.

40312120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 40312120.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3219 + ... + 9538.

It is an arithmetic number, because the mean of its divisors is an integer number (2870550).

Almost surely, 2^40312120 is an apocalyptic number.

40312120 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40312120 is an abundant number, since it is smaller than the sum of its proper divisors (51545480).

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

40312120 is a wasteful number, since it uses less digits than its factorization.

40312120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12847 (or 12843 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 40312120 is about 6349.1826245588. The cubic root of 40312120 is about 342.8824151345.

Adding to 40312120 its reverse (2121304), we get a palindrome (42433424).

The spelling of 40312120 in words is "forty million, three hundred twelve thousand, one hundred twenty".