6390611808 has 384 divisors, whose sum is σ = 20734672896. Its totient is φ = 1685145600.

The previous prime is 6390611783. The next prime is 6390611849. The reversal of 6390611808 is 8081160936.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

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

It is a self number, because there is not a number n which added to its sum of digits gives 6390611808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 59725291 + ... + 59725397.

It is an arithmetic number, because the mean of its divisors is an integer number (53996544).

Almost surely, 2^6390611808 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 6390611808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10367336448).

6390611808 is an abundant number, since it is smaller than the sum of its proper divisors (14344061088).

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

6390611808 is a wasteful number, since it uses less digits than its factorization.

6390611808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266 (or 258 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 6390611808 is about 79941.3022661002. The cubic root of 6390611808 is about 1855.7272531976.

The spelling of 6390611808 in words is "six billion, three hundred ninety million, six hundred eleven thousand, eight hundred eight".