347220 has 48 divisors (see below), whose sum is σ = 1081920. Its totient is φ = 92448.

The previous prime is 347209. The next prime is 347227. The reversal of 347220 is 22743.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 347193 and 347202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (347227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219 + ... + 861.

It is an arithmetic number, because the mean of its divisors is an integer number (22540).

2³⁴⁷²²⁰ is an apocalyptic number.

347220 is a gapful number since it is divisible by the number (30) 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 347220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (540960).

347220 is an abundant number, since it is smaller than the sum of its proper divisors (734700).

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

347220 is a wasteful number, since it uses less digits than its factorization.

347220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661 (or 653 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 347220 is about 589.2537653677. The cubic root of 347220 is about 70.2859054979.

Adding to 347220 its reverse (22743), we get a palindrome (369963).

The spelling of 347220 in words is "three hundred forty-seven thousand, two hundred twenty", and thus it is an iban number.