312105440 has 48 divisors (see below), whose sum is σ = 739104912. Its totient is φ = 124545024.

The previous prime is 312105433. The next prime is 312105487. The reversal of 312105440 is 44501213.

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 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, 72632 + ... + 76808.

It is an arithmetic number, because the mean of its divisors is an integer number (15398019).

Almost surely, 2^312105440 is an apocalyptic number.

It is an amenable number.

312105440 is an abundant number, since it is smaller than the sum of its proper divisors (426999472).

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

312105440 is a wasteful number, since it uses less digits than its factorization.

312105440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4659 (or 4651 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 312105440 is about 17666.5061627929. The cubic root of 312105440 is about 678.3186837016.

Adding to 312105440 its reverse (44501213), we get a palindrome (356606653).

The spelling of 312105440 in words is "three hundred twelve million, one hundred five thousand, four hundred forty".