6420700 has 72 divisors (see below), whose sum is σ = 16405200. Its totient is φ = 2150400.

The previous prime is 6420697. The next prime is 6420707. The reversal of 6420700 is 70246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6420707) 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 23 ways as a sum of consecutive naturals, for example, 14076 + ... + 14524.

It is an arithmetic number, because the mean of its divisors is an integer number (227850).

Almost surely, 2^6420700 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6420700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8202600).

6420700 is an abundant number, since it is smaller than the sum of its proper divisors (9984500).

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

6420700 is a wasteful number, since it uses less digits than its factorization.

6420700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487 (or 480 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 6420700 is about 2533.9100220805. The cubic root of 6420700 is about 185.8635064432.

Adding to 6420700 its reverse (70246), we get a palindrome (6490946).

The spelling of 6420700 in words is "six million, four hundred twenty thousand, seven hundred".