6340340 has 24 divisors (see below), whose sum is σ = 13535592. Its totient is φ = 2494080.

The previous prime is 6340297. The next prime is 6340343. The reversal of 6340340 is 430436.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16 + 6340324 = 4^2 + 2518^2 .

It is a super-2 number, since 2×6340340² = 80399822631200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6340343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1379 + ... + 3818.

It is an arithmetic number, because the mean of its divisors is an integer number (563983).

Almost surely, 2^6340340 is an apocalyptic number.

It is an amenable number.

6340340 is an abundant number, since it is smaller than the sum of its proper divisors (7195252).

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

6340340 is a wasteful number, since it uses less digits than its factorization.

6340340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5267 (or 5265 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 6340340 is about 2518.0031771227. The cubic root of 6340340 is about 185.0848405604.

Adding to 6340340 its reverse (430436), we get a palindrome (6770776).

The spelling of 6340340 in words is "six million, three hundred forty thousand, three hundred forty".