6391393008 has 480 divisors, whose sum is σ = 23330506752. Its totient is φ = 1480550400.

The previous prime is 6391392971. The next prime is 6391393009. The reversal of 6391393008 is 8003931936.

It is a super-2 number, since 2×6391393008² = 81699809165422576128, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6391393009) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10426110 + ... + 10426722.

Almost surely, 2^6391393008 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 6391393008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11665253376).

6391393008 is an abundant number, since it is smaller than the sum of its proper divisors (16939113744).

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

6391393008 is a wasteful number, since it uses less digits than its factorization.

6391393008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693 (or 680 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 42.

The square root of 6391393008 is about 79946.1882018149. The cubic root of 6391393008 is about 1855.8028659405.

The spelling of 6391393008 in words is "six billion, three hundred ninety-one million, three hundred ninety-three thousand, eight".