6420320 has 24 divisors (see below), whose sum is σ = 15168384. Its totient is φ = 2568064.

The previous prime is 6420307. The next prime is 6420343. The reversal of 6420320 is 230246.

It is a congruent number.

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, 19904 + ... + 20223.

It is an arithmetic number, because the mean of its divisors is an integer number (632016).

Almost surely, 2^6420320 is an apocalyptic number.

It is an amenable number.

6420320 is an abundant number, since it is smaller than the sum of its proper divisors (8748064).

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

6420320 is a wasteful number, since it uses less digits than its factorization.

6420320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40142 (or 40134 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 6420320 is about 2533.8350380402. The cubic root of 6420320 is about 185.8598396818.

Adding to 6420320 its reverse (230246), we get a palindrome (6650566).

The spelling of 6420320 in words is "six million, four hundred twenty thousand, three hundred twenty".