343646 has 4 divisors (see below), whose sum is σ = 515472. Its totient is φ = 171822.

The previous prime is 343639. The next prime is 343649. The reversal of 343646 is 646343.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 646343 = 353 ⋅1831.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 343646.

It is not an unprimeable number, because it can be changed into a prime (343649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85910 + ... + 85913.

It is an arithmetic number, because the mean of its divisors is an integer number (128868).

2³⁴³⁶⁴⁶ is an apocalyptic number.

343646 is a deficient number, since it is larger than the sum of its proper divisors (171826).

343646 is a wasteful number, since it uses less digits than its factorization.

343646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171825.

The product of its digits is 5184, while the sum is 26.

The square root of 343646 is about 586.2132717706. The cubic root of 343646 is about 70.0439180183.

Adding to 343646 its reverse (646343), we get a palindrome (989989).

It can be divided in two parts, 343 and 646, that added together give a palindrome (989).

The spelling of 343646 in words is "three hundred forty-three thousand, six hundred forty-six".