349358138 has 4 divisors (see below), whose sum is σ = 524037210. Its totient is φ = 174679068.

The previous prime is 349358137. The next prime is 349358159. The reversal of 349358138 is 831853943.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 237992329 + 111365809 = 15427^2 + 10553^2 .

It is a super-2 number, since 2×349358138² = 244102217173654088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (349358137) by changing a digit.

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, 87339533 + ... + 87339536.

Almost surely, 2^349358138 is an apocalyptic number.

349358138 is a deficient number, since it is larger than the sum of its proper divisors (174679072).

349358138 is a wasteful number, since it uses less digits than its factorization.

349358138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174679071.

The product of its digits is 311040, while the sum is 44.

The square root of 349358138 is about 18691.1245782591. The cubic root of 349358138 is about 704.2988102335.

The spelling of 349358138 in words is "three hundred forty-nine million, three hundred fifty-eight thousand, one hundred thirty-eight".