312343240 has 32 divisors (see below), whose sum is σ = 766661760. Its totient is φ = 113579200.

The previous prime is 312343237. The next prime is 312343309. The reversal of 312343240 is 42343213.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 354496 + ... + 355375.

It is an arithmetic number, because the mean of its divisors is an integer number (23958180).

Almost surely, 2^312343240 is an apocalyptic number.

It is an amenable number.

312343240 is an abundant number, since it is smaller than the sum of its proper divisors (454318520).

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

312343240 is a wasteful number, since it uses less digits than its factorization.

312343240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709893 (or 709889 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 312343240 is about 17673.2351311241. The cubic root of 312343240 is about 678.4909152752.

Adding to 312343240 its reverse (42343213), we get a palindrome (354686453).

The spelling of 312343240 in words is "three hundred twelve million, three hundred forty-three thousand, two hundred forty".