312243320 has 32 divisors (see below), whose sum is σ = 704592000. Its totient is φ = 124533888.

The previous prime is 312243317. The next prime is 312243329. The reversal of 312243320 is 23342213.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 312243292 and 312243301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312243329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2777 + ... + 25143.

It is an arithmetic number, because the mean of its divisors is an integer number (22018500).

Almost surely, 2^312243320 is an apocalyptic number.

It is an amenable number.

312243320 is an abundant number, since it is smaller than the sum of its proper divisors (392348680).

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

312243320 is a wasteful number, since it uses less digits than its factorization.

312243320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22727 (or 22723 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 312243320 is about 17670.4080315085. The cubic root of 312243320 is about 678.4185567989.

Adding to 312243320 its reverse (23342213), we get a palindrome (335585533).

The spelling of 312243320 in words is "three hundred twelve million, two hundred forty-three thousand, three hundred twenty".