347920 has 20 divisors (see below), whose sum is σ = 809100. Its totient is φ = 139136.

The previous prime is 347899. The next prime is 347929. The reversal of 347920 is 29743.

It can be written as a sum of positive squares in 2 ways, for example, as 51984 + 295936 = 228^2 + 544^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (347929) 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, 2095 + ... + 2254.

It is an arithmetic number, because the mean of its divisors is an integer number (40455).

2³⁴⁷⁹²⁰ is an apocalyptic number.

It is an amenable number.

347920 is an abundant number, since it is smaller than the sum of its proper divisors (461180).

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

347920 is a wasteful number, since it uses less digits than its factorization.

347920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4362 (or 4356 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 347920 is about 589.8474379024. The cubic root of 347920 is about 70.3331062238. Note that the first 3 decimals are identical.

The spelling of 347920 in words is "three hundred forty-seven thousand, nine hundred twenty".