347440 has 40 divisors (see below), whose sum is σ = 834768. Its totient is φ = 134400.

The previous prime is 347437. The next prime is 347443. The reversal of 347440 is 44743.

It is an interprime number because it is at equal distance from previous prime (347437) and next prime (347443).

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (347443) 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, 3390 + ... + 3490.

2³⁴⁷⁴⁴⁰ 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 347440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (417384).

347440 is an abundant number, since it is smaller than the sum of its proper divisors (487328).

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

347440 is a wasteful number, since it uses less digits than its factorization.

347440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 151 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 347440 is about 589.4404125949. The cubic root of 347440 is about 70.3007468421.

It can be divided in two parts, 347 and 440, that added together give a palindrome (787).

The spelling of 347440 in words is "three hundred forty-seven thousand, four hundred forty", and thus it is an iban number.