310138 has 4 divisors (see below), whose sum is σ = 465210. Its totient is φ = 155068.

The previous prime is 310129. The next prime is 310169. The reversal of 310138 is 831013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 831013 = 23 ⋅36131.

It can be written as a sum of positive squares in only one way, i.e., 267289 + 42849 = 517^2 + 207^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77533 + ... + 77536.

2³¹⁰¹³⁸ is an apocalyptic number.

310138 is a deficient number, since it is larger than the sum of its proper divisors (155072).

310138 is a wasteful number, since it uses less digits than its factorization.

310138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155071.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 310138 is about 556.9003501525. The cubic root of 310138 is about 67.6890357207.

The spelling of 310138 in words is "three hundred ten thousand, one hundred thirty-eight".