340240 has 20 divisors (see below), whose sum is σ = 791244. Its totient is φ = 136064.

The previous prime is 340237. The next prime is 340261. The reversal of 340240 is 42043.

It can be written as a sum of positive squares in 2 ways, for example, as 73984 + 266256 = 272^2 + 516^2 .

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

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 340240.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2047 + ... + 2206.

2³⁴⁰²⁴⁰ is an apocalyptic number.

It is an amenable number.

340240 is an abundant number, since it is smaller than the sum of its proper divisors (451004).

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

340240 is a wasteful number, since it uses less digits than its factorization.

340240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4266 (or 4260 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 340240 is about 583.3009514822. The cubic root of 340240 is about 69.8117390348.

Adding to 340240 its reverse (42043), we get a palindrome (382283).

The spelling of 340240 in words is "three hundred forty thousand, two hundred forty", and thus it is an iban number.