312440322 has 24 divisors (see below), whose sum is σ = 639773424. Its totient is φ = 101721144.

The previous prime is 312440311. The next prime is 312440329. The reversal of 312440322 is 223044213.

It is a super-2 number, since 2×312440322² = 195237909622927368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (312440329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2988 + ... + 25175.

It is an arithmetic number, because the mean of its divisors is an integer number (26657226).

Almost surely, 2^312440322 is an apocalyptic number.

312440322 is an abundant number, since it is smaller than the sum of its proper divisors (327333102).

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

312440322 is a wasteful number, since it uses less digits than its factorization.

312440322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28254 (or 28211 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 312440322 is about 17675.9815003298. The cubic root of 312440322 is about 678.5612037948.

Adding to 312440322 its reverse (223044213), we get a palindrome (535484535).

The spelling of 312440322 in words is "three hundred twelve million, four hundred forty thousand, three hundred twenty-two".