312199938 has 12 divisors (see below), whose sum is σ = 676433238. Its totient is φ = 104066640.

The previous prime is 312199933. The next prime is 312199949. The reversal of 312199938 is 839991213.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 309161889 + 3038049 = 17583^2 + 1743^2 .

It is a junction number, because it is equal to n+sod(n) for n = 312199893 and 312199902.

It is not an unprimeable number, because it can be changed into a prime (312199933) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 8672203 + ... + 8672238.

Almost surely, 2^312199938 is an apocalyptic number.

312199938 is an abundant number, since it is smaller than the sum of its proper divisors (364233300).

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

312199938 is a wasteful number, since it uses less digits than its factorization.

312199938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17344449 (or 17344446 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 312199938 is about 17669.1804563766. The cubic root of 312199938 is about 678.3871363061.

The spelling of 312199938 in words is "three hundred twelve million, one hundred ninety-nine thousand, nine hundred thirty-eight".