312332640 has 192 divisors, whose sum is σ = 1081382400. Its totient is φ = 75423744.

The previous prime is 312332597. The next prime is 312332677. The reversal of 312332640 is 46233213.

312332640 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 312332640.

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 31 ways as a sum of consecutive naturals, for example, 209016 + ... + 210504.

It is an arithmetic number, because the mean of its divisors is an integer number (5632200).

Almost surely, 2^312332640 is an apocalyptic number.

312332640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 312332640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (540691200).

312332640 is an abundant number, since it is smaller than the sum of its proper divisors (769049760).

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

312332640 is a wasteful number, since it uses less digits than its factorization.

312332640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1549 (or 1541 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 312332640 is about 17672.9352400783. The cubic root of 312332640 is about 678.4832398676.

Adding to 312332640 its reverse (46233213), we get a palindrome (358565853).

The spelling of 312332640 in words is "three hundred twelve million, three hundred thirty-two thousand, six hundred forty".