6304640 has 32 divisors (see below), whose sum is σ = 15073560. Its totient is φ = 2521600.

The previous prime is 6304631. The next prime is 6304651. The reversal of 6304640 is 464036.

It is a tau number, because it is divible by the number of its divisors (32).

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4286 + ... + 5565.

Almost surely, 2^6304640 is an apocalyptic number.

It is an amenable number.

6304640 is an abundant number, since it is smaller than the sum of its proper divisors (8768920).

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

6304640 is an equidigital number, since it uses as much as digits as its factorization.

6304640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9870 (or 9858 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 6304640 is about 2510.9042195990. The cubic root of 6304640 is about 184.7368061634.

Adding to 6304640 its reverse (464036), we get a palindrome (6768676).

The spelling of 6304640 in words is "six million, three hundred four thousand, six hundred forty".