312738087944 has 8 divisors (see below), whose sum is σ = 586383914910. Its totient is φ = 156369043968.

The previous prime is 312738087931. The next prime is 312738087947. The reversal of 312738087944 is 449780837213.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 310081922500 + 2656165444 = 556850^2 + 51538^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×312738087944² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 312738087944.

It is not an unprimeable number, because it can be changed into a prime (312738087947) 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 as a sum of consecutive naturals, namely, 19546130489 + ... + 19546130504.

Almost surely, 2^312738087944 is an apocalyptic number.

It is an amenable number.

312738087944 is a deficient number, since it is larger than the sum of its proper divisors (273645826966).

312738087944 is a wasteful number, since it uses less digits than its factorization.

312738087944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39092260999 (or 39092260995 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 56.

The spelling of 312738087944 in words is "three hundred twelve billion, seven hundred thirty-eight million, eighty-seven thousand, nine hundred forty-four".