6440196 has 48 divisors (see below), whose sum is σ = 17583104. Its totient is φ = 1796256.

The previous prime is 6440191. The next prime is 6440201. The reversal of 6440196 is 6910446.

It is an interprime number because it is at equal distance from previous prime (6440191) and next prime (6440201).

It is a super-2 number, since 2×6440196² = 82952249036832, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (6440191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2721 + ... + 4503.

Almost surely, 2^6440196 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 6440196, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8791552).

6440196 is an abundant number, since it is smaller than the sum of its proper divisors (11142908).

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

6440196 is a wasteful number, since it uses less digits than its factorization.

6440196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1840 (or 1838 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 6440196 is about 2537.7541252060. The cubic root of 6440196 is about 186.0514368091.

The spelling of 6440196 in words is "six million, four hundred forty thousand, one hundred ninety-six".