6396691392 has 448 divisors, whose sum is σ = 24374246400. Its totient is φ = 1597501440.

The previous prime is 6396691381. The next prime is 6396691397. The reversal of 6396691392 is 2931966936.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6396691397) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2986642 + ... + 2988782.

It is an arithmetic number, because the mean of its divisors is an integer number (54406800).

Almost surely, 2^6396691392 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 6396691392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12187123200).

6396691392 is an abundant number, since it is smaller than the sum of its proper divisors (17977555008).

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

6396691392 is a wasteful number, since it uses less digits than its factorization.

6396691392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2201 (or 2185 counting only the distinct ones).

The product of its digits is 2834352, while the sum is 54.

The square root of 6396691392 is about 79979.3185267291. The cubic root of 6396691392 is about 1856.3155366720.

The spelling of 6396691392 in words is "six billion, three hundred ninety-six million, six hundred ninety-one thousand, three hundred ninety-two".