6396838390 has 16 divisors (see below), whose sum is σ = 11516602032. Its totient is φ = 2558225824.

The previous prime is 6396838373. The next prime is 6396838391. The reversal of 6396838390 is 938386936.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6396838391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8704 + ... + 113443.

It is an arithmetic number, because the mean of its divisors is an integer number (719787627).

Almost surely, 2^6396838390 is an apocalyptic number.

6396838390 is a deficient number, since it is larger than the sum of its proper divisors (5119763642).

6396838390 is a wasteful number, since it uses less digits than its factorization.

6396838390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127391.

The product of its (nonzero) digits is 5038848, while the sum is 55.

The square root of 6396838390 is about 79980.2374965216. The cubic root of 6396838390 is about 1856.3297561366.

The spelling of 6396838390 in words is "six billion, three hundred ninety-six million, eight hundred thirty-eight thousand, three hundred ninety".