6396838478 has 8 divisors (see below), whose sum is σ = 9598504968. Its totient is φ = 3197336824.

The previous prime is 6396838463. The next prime is 6396838501. The reversal of 6396838478 is 8748386936.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6396838478.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 533801 + ... + 545652.

It is an arithmetic number, because the mean of its divisors is an integer number (1199813121).

Almost surely, 2^6396838478 is an apocalyptic number.

6396838478 is a deficient number, since it is larger than the sum of its proper divisors (3201666490).

6396838478 is a wasteful number, since it uses less digits than its factorization.

6396838478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082418.

The product of its digits is 41803776, while the sum is 62.

The square root of 6396838478 is about 79980.2380466575. The cubic root of 6396838478 is about 1856.3297646490.

The spelling of 6396838478 in words is "six billion, three hundred ninety-six million, eight hundred thirty-eight thousand, four hundred seventy-eight".