347720 has 16 divisors (see below), whose sum is σ = 782460. Its totient is φ = 139072.

The previous prime is 347717. The next prime is 347729. The reversal of 347720 is 27743.

347720 is nontrivially palindromic in base 9.

It can be written as a sum of positive squares in 2 ways, for example, as 306916 + 40804 = 554^2 + 202^2 .

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 347720.

It is not an unprimeable number, because it can be changed into a prime (347729) 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, 4307 + ... + 4386.

2³⁴⁷⁷²⁰ is an apocalyptic number.

It is an amenable number.

347720 is an abundant number, since it is smaller than the sum of its proper divisors (434740).

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

347720 is a wasteful number, since it uses less digits than its factorization.

347720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8704 (or 8700 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 23.

The square root of 347720 is about 589.6778781674. The cubic root of 347720 is about 70.3196267673.

Adding to 347720 its sum of digits (23), we get a palindrome (347743).

The spelling of 347720 in words is "three hundred forty-seven thousand, seven hundred twenty", and thus it is an iban number.