343656 has 64 divisors (see below), whose sum is σ = 1003200. Its totient is φ = 108864.

The previous prime is 343649. The next prime is 343661. The reversal of 343656 is 656343.

343656 is a `hidden beast` number, since 3 + 4 + 3 + 656 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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

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 343656.

It is an unprimeable number.

343656 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7971 + ... + 8013.

It is an arithmetic number, because the mean of its divisors is an integer number (15675).

343656 is a Friedman number, since it can be written as 43*(6^5+6^3), using all its digits and the basic arithmetic operations.

2³⁴³⁶⁵⁶ is an apocalyptic number.

343656 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 343656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (501600).

343656 is an abundant number, since it is smaller than the sum of its proper divisors (659544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

343656 is a wasteful number, since it uses less digits than its factorization.

343656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95 (or 85 counting only the distinct ones).

The product of its digits is 6480, while the sum is 27.

The square root of 343656 is about 586.2218010276. The cubic root of 343656 is about 70.0445974310.

Adding to 343656 its reverse (656343), we get a palindrome (999999).

It can be divided in two parts, 343 and 656, that added together give a palindrome (999).

The spelling of 343656 in words is "three hundred forty-three thousand, six hundred fifty-six".