312504138 has 12 divisors (see below), whose sum is σ = 677092338. Its totient is φ = 104168040.

The previous prime is 312504133. The next prime is 312504139. The reversal of 312504138 is 831405213.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 180552969 + 131951169 = 13437^2 + 11487^2 .

It is not an unprimeable number, because it can be changed into a prime (312504133) 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, 8680653 + ... + 8680688.

Almost surely, 2^312504138 is an apocalyptic number.

312504138 is an abundant number, since it is smaller than the sum of its proper divisors (364588200).

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

312504138 is a wasteful number, since it uses less digits than its factorization.

312504138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17361349 (or 17361346 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 312504138 is about 17677.7865695907. The cubic root of 312504138 is about 678.6073994049.

The spelling of 312504138 in words is "three hundred twelve million, five hundred four thousand, one hundred thirty-eight".