312238 has 4 divisors (see below), whose sum is σ = 468360. Its totient is φ = 156118.

The previous prime is 312233. The next prime is 312241. The reversal of 312238 is 832213.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 832213 = 29 ⋅28697.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78058 + ... + 78061.

It is an arithmetic number, because the mean of its divisors is an integer number (117090).

2³¹²²³⁸ is an apocalyptic number.

312238 is a deficient number, since it is larger than the sum of its proper divisors (156122).

312238 is a wasteful number, since it uses less digits than its factorization.

312238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156121.

The product of its digits is 288, while the sum is 19.

The square root of 312238 is about 558.7826053127. The cubic root of 312238 is about 67.8414703813.

It can be divided in two parts, 3122 and 38, that added together give a triangular number (3160 = T₇₉).

The spelling of 312238 in words is "three hundred twelve thousand, two hundred thirty-eight".