347840 has 28 divisors (see below), whose sum is σ = 829056. Its totient is φ = 139008.

The previous prime is 347821. The next prime is 347849. The reversal of 347840 is 48743.

347840 is nontrivially palindromic in base 13.

It is not an unprimeable number, because it can be changed into a prime (347849) 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, 224 + ... + 863.

2³⁴⁷⁸⁴⁰ is an apocalyptic number.

It is an amenable number.

347840 is an abundant number, since it is smaller than the sum of its proper divisors (481216).

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

347840 is a wasteful number, since it uses less digits than its factorization.

347840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104 (or 1094 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 347840 is about 589.7796198581. The cubic root of 347840 is about 70.3277150613.

The spelling of 347840 in words is "three hundred forty-seven thousand, eight hundred forty".