6396840190 has 32 divisors (see below), whose sum is σ = 12463022880. Its totient is φ = 2349911424.

The previous prime is 6396840179. The next prime is 6396840193. The reversal of 6396840190 is 910486936.

It is a super-2 number, since 2×6396840190² = 81839128832798472200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6396840190.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6396840193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99280 + ... + 150499.

It is an arithmetic number, because the mean of its divisors is an integer number (389469465).

Almost surely, 2^6396840190 is an apocalyptic number.

6396840190 is a deficient number, since it is larger than the sum of its proper divisors (6066182690).

6396840190 is a wasteful number, since it uses less digits than its factorization.

6396840190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249996.

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 6396840190 is about 79980.2487493006. The cubic root of 6396840190 is about 1856.3299302535.

The spelling of 6396840190 in words is "six billion, three hundred ninety-six million, eight hundred forty thousand, one hundred ninety".