312544140 has 24 divisors (see below), whose sum is σ = 875123760. Its totient is φ = 83345088.

The previous prime is 312544121. The next prime is 312544151. The reversal of 312544140 is 41445213.

It is a self number, because there is not a number n which added to its sum of digits gives 312544140.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2604475 + ... + 2604594.

It is an arithmetic number, because the mean of its divisors is an integer number (36463490).

Almost surely, 2^312544140 is an apocalyptic number.

312544140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

312544140 is an abundant number, since it is smaller than the sum of its proper divisors (562579620).

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

312544140 is a wasteful number, since it uses less digits than its factorization.

312544140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5209081 (or 5209079 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 312544140 is about 17678.9179533138. The cubic root of 312544140 is about 678.6363531495.

Adding to 312544140 its reverse (41445213), we get a palindrome (353989353).

The spelling of 312544140 in words is "three hundred twelve million, five hundred forty-four thousand, one hundred forty".