343840138 has 8 divisors (see below), whose sum is σ = 516106080. Its totient is φ = 171804780.

The previous prime is 343840111. The next prime is 343840139. The reversal of 343840138 is 831048343.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-5 number, since 5×343840138⁵ (a number of 44 digits) contains 55555 as substring.

It is not an unprimeable number, because it can be changed into a prime (343840139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53868 + ... + 59911.

It is an arithmetic number, because the mean of its divisors is an integer number (64513260).

Almost surely, 2^343840138 is an apocalyptic number.

343840138 is a deficient number, since it is larger than the sum of its proper divisors (172265942).

343840138 is a wasteful number, since it uses less digits than its factorization.

343840138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115292.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 343840138 is about 18542.9268994946. The cubic root of 343840138 is about 700.5710564573.

The spelling of 343840138 in words is "three hundred forty-three million, eight hundred forty thousand, one hundred thirty-eight".