343858 has 4 divisors (see below), whose sum is σ = 515790. Its totient is φ = 171928.

The previous prime is 343831. The next prime is 343891. The reversal of 343858 is 858343.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 858343 = 733 ⋅1171.

It can be written as a sum of positive squares in only one way, i.e., 339889 + 3969 = 583^2 + 63^2 .

It is a super-4 number, since 4×343858⁴ (a number of 23 digits) contains 4444 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85963 + ... + 85966.

2³⁴³⁸⁵⁸ is an apocalyptic number.

343858 is a deficient number, since it is larger than the sum of its proper divisors (171932).

343858 is a wasteful number, since it uses less digits than its factorization.

343858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171931.

The product of its digits is 11520, while the sum is 31.

The square root of 343858 is about 586.3940654543. The cubic root of 343858 is about 70.0583187466.

The spelling of 343858 in words is "three hundred forty-three thousand, eight hundred fifty-eight".