6813393408 has 240 divisors, whose sum is σ = 21287762496. Its totient is φ = 2171473920.

The previous prime is 6813393403. The next prime is 6813393439. The reversal of 6813393408 is 8043933186.

It is not an unprimeable number, because it can be changed into a prime (6813393401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2860378 + ... + 2862758.

Almost surely, 2^6813393408 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 6813393408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10643881248).

6813393408 is an abundant number, since it is smaller than the sum of its proper divisors (14474369088).

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

6813393408 is an equidigital number, since it uses as much as digits as its factorization.

6813393408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2437 (or 2409 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 6813393408 is about 82543.2820282790. The cubic root of 6813393408 is about 1895.7794968691.

The spelling of 6813393408 in words is "six billion, eight hundred thirteen million, three hundred ninety-three thousand, four hundred eight".