6440412 has 48 divisors (see below), whose sum is σ = 16595712. Its totient is φ = 1927680.

The previous prime is 6440393. The next prime is 6440419. The reversal of 6440412 is 2140446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6440419) 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 15 ways as a sum of consecutive naturals, for example, 12553 + ... + 13055.

It is an arithmetic number, because the mean of its divisors is an integer number (345744).

Almost surely, 2^6440412 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 6440412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8297856).

6440412 is an abundant number, since it is smaller than the sum of its proper divisors (10155300).

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

6440412 is a wasteful number, since it uses less digits than its factorization.

6440412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618 (or 616 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 6440412 is about 2537.7966821635. The cubic root of 6440412 is about 186.0535168007.

Adding to 6440412 its reverse (2140446), we get a palindrome (8580858).

The spelling of 6440412 in words is "six million, four hundred forty thousand, four hundred twelve".