312838 has 4 divisors (see below), whose sum is σ = 469260. Its totient is φ = 156418.

The previous prime is 312799. The next prime is 312839. The reversal of 312838 is 838213.

312838 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 838213 = 59 ⋅14207.

It is a super-2 number, since 2×312838² = 195735228488, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78208 + ... + 78211.

It is an arithmetic number, because the mean of its divisors is an integer number (117315).

2³¹²⁸³⁸ is an apocalyptic number.

312838 is a deficient number, since it is larger than the sum of its proper divisors (156422).

312838 is a wasteful number, since it uses less digits than its factorization.

312838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156421.

The product of its digits is 1152, while the sum is 25.

The square root of 312838 is about 559.3192290633. The cubic root of 312838 is about 67.8848975502.

It can be divided in two parts, 31 and 2838, that multiplied together give a palindrome (87978).

The spelling of 312838 in words is "three hundred twelve thousand, eight hundred thirty-eight".