340644 has 12 divisors (see below), whose sum is σ = 794864. Its totient is φ = 113544.

The previous prime is 340643. The next prime is 340649. The reversal of 340644 is 446043.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 340644.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 340644.

It is not an unprimeable number, because it can be changed into a prime (340643) 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, 14182 + ... + 14205.

2³⁴⁰⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

340644 is an abundant number, since it is smaller than the sum of its proper divisors (454220).

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

340644 is a wasteful number, since it uses less digits than its factorization.

340644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28394 (or 28392 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 340644 is about 583.6471536811. The cubic root of 340644 is about 69.8393595251.

Adding to 340644 its reverse (446043), we get a palindrome (786687).

The spelling of 340644 in words is "three hundred forty thousand, six hundred forty-four".