312140838 has 8 divisors (see below), whose sum is σ = 624281688. Its totient is φ = 104046944.

The previous prime is 312140819. The next prime is 312140861. The reversal of 312140838 is 838041213.

It is a sphenic number, since it is the product of 3 distinct primes.

312140838 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 26011731 + ... + 26011742.

It is an arithmetic number, because the mean of its divisors is an integer number (78035211).

Almost surely, 2^312140838 is an apocalyptic number.

312140838 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

312140838 is a wasteful number, since it uses less digits than its factorization.

312140838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52023478.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 312140838 is about 17667.5079736787. The cubic root of 312140838 is about 678.3443269768.

The spelling of 312140838 in words is "three hundred twelve million, one hundred forty thousand, eight hundred thirty-eight".