6400812 has 24 divisors (see below), whose sum is σ = 16293312. Its totient is φ = 1939600.

The previous prime is 6400799. The next prime is 6400813. The reversal of 6400812 is 2180046.

It is not an unprimeable number, because it can be changed into a prime (6400813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24114 + ... + 24377.

It is an arithmetic number, because the mean of its divisors is an integer number (678888).

Almost surely, 2^6400812 is an apocalyptic number.

It is an amenable number.

6400812 is an abundant number, since it is smaller than the sum of its proper divisors (9892500).

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

6400812 is a wasteful number, since it uses less digits than its factorization.

6400812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48509 (or 48507 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 6400812 is about 2529.9826086359. The cubic root of 6400812 is about 185.6714050336.

Adding to 6400812 its reverse (2180046), we get a palindrome (8580858).

The spelling of 6400812 in words is "six million, four hundred thousand, eight hundred twelve".