346706138 has 4 divisors (see below), whose sum is σ = 520059210. Its totient is φ = 173353068.

The previous prime is 346706123. The next prime is 346706141. The reversal of 346706138 is 831607643.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 831607643 = 31 ⋅26826053.

It can be written as a sum of positive squares in only one way, i.e., 321233929 + 25472209 = 17923^2 + 5047^2 .

It is a super-2 number, since 2×346706138² = 240410292253750088, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 86676533 + ... + 86676536.

Almost surely, 2^346706138 is an apocalyptic number.

346706138 is a deficient number, since it is larger than the sum of its proper divisors (173353072).

346706138 is a wasteful number, since it uses less digits than its factorization.

346706138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173353071.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 346706138 is about 18620.0466701886. The cubic root of 346706138 is about 702.5121559174.

The spelling of 346706138 in words is "three hundred forty-six million, seven hundred six thousand, one hundred thirty-eight".