343720 has 32 divisors (see below), whose sum is σ = 834120. Its totient is φ = 126720.

The previous prime is 343709. The next prime is 343727. The reversal of 343720 is 27343.

It can be written as a sum of positive squares in 4 ways, for example, as 264196 + 79524 = 514^2 + 282^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190 + ... + 850.

2³⁴³⁷²⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 343720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (417060).

343720 is an abundant number, since it is smaller than the sum of its proper divisors (490400).

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

343720 is a wasteful number, since it uses less digits than its factorization.

343720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685 (or 681 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 19.

The square root of 343720 is about 586.2763853337. The cubic root of 343720 is about 70.0489453603.

The spelling of 343720 in words is "three hundred forty-three thousand, seven hundred twenty", and thus it is an iban number.