312120140440 has 16 divisors (see below), whose sum is σ = 702270316080. Its totient is φ = 124848056160.

The previous prime is 312120140419. The next prime is 312120140441. The reversal of 312120140440 is 44041021213.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312120140441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3901501716 + ... + 3901501795.

It is an arithmetic number, because the mean of its divisors is an integer number (43891894755).

Almost surely, 2^312120140440 is an apocalyptic number.

It is an amenable number.

312120140440 is an abundant number, since it is smaller than the sum of its proper divisors (390150175640).

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

312120140440 is a wasteful number, since it uses less digits than its factorization.

312120140440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7803003522 (or 7803003518 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 312120140440 its reverse (44041021213), we get a palindrome (356161161653).

The spelling of 312120140440 in words is "three hundred twelve billion, one hundred twenty million, one hundred forty thousand, four hundred forty".