312885340 has 48 divisors (see below), whose sum is σ = 698144832. Its totient is φ = 117380096.

The previous prime is 312885301. The next prime is 312885343. The reversal of 312885340 is 43588213.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 312885296 and 312885305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312885343) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 106329 + ... + 109231.

It is an arithmetic number, because the mean of its divisors is an integer number (14544684).

Almost surely, 2^312885340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 312885340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (349072416).

312885340 is an abundant number, since it is smaller than the sum of its proper divisors (385259492).

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

312885340 is a wasteful number, since it uses less digits than its factorization.

312885340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3246 (or 3244 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 312885340 is about 17688.5652329407. The cubic root of 312885340 is about 678.8832158961.

The spelling of 312885340 in words is "three hundred twelve million, eight hundred eighty-five thousand, three hundred forty".