312491610438 has 32 divisors (see below), whose sum is σ = 714492234240. Its totient is φ = 89255105280.

The previous prime is 312491610401. The next prime is 312491610439. The reversal of 312491610438 is 834016194213.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 312491610438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312491610439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1040818 + ... + 1307013.

It is an arithmetic number, because the mean of its divisors is an integer number (22327882320).

Almost surely, 2^312491610438 is an apocalyptic number.

312491610438 is an abundant number, since it is smaller than the sum of its proper divisors (402000623802).

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

312491610438 is a wasteful number, since it uses less digits than its factorization.

312491610438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2351012.

The product of its (nonzero) digits is 124416, while the sum is 42.

The spelling of 312491610438 in words is "three hundred twelve billion, four hundred ninety-one million, six hundred ten thousand, four hundred thirty-eight".