6420706400 has 36 divisors (see below), whose sum is σ = 15674551452. Its totient is φ = 2568282240.

The previous prime is 6420706349. The next prime is 6420706417. The reversal of 6420706400 is 46070246.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4012142 + ... + 4013741.

It is an arithmetic number, because the mean of its divisors is an integer number (435404207).

Almost surely, 2^6420706400 is an apocalyptic number.

It is an amenable number.

6420706400 is an abundant number, since it is smaller than the sum of its proper divisors (9253845052).

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

6420706400 is a wasteful number, since it uses less digits than its factorization.

6420706400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8025903 (or 8025890 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 6420706400 is about 80129.3104924783. The cubic root of 6420706400 is about 1858.6356819796.

Adding to 6420706400 its reverse (46070246), we get a palindrome (6466776646).

The spelling of 6420706400 in words is "six billion, four hundred twenty million, seven hundred six thousand, four hundred".