6389393220 has 432 divisors, whose sum is σ = 24451435008. Its totient is φ = 1341204480.

The previous prime is 6389393209. The next prime is 6389393243. The reversal of 6389393220 is 223939836.

6389393220 is a `hidden beast` number, since 6 + 38 + 9 + 393 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 6446925 + ... + 6447915.

It is an arithmetic number, because the mean of its divisors is an integer number (56600544).

Almost surely, 2^6389393220 is an apocalyptic number.

6389393220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6389393220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12225717504).

6389393220 is an abundant number, since it is smaller than the sum of its proper divisors (18062041788).

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

6389393220 is a wasteful number, since it uses less digits than its factorization.

6389393220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080 (or 1068 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 45.

The square root of 6389393220 is about 79933.6801354723. The cubic root of 6389393220 is about 1855.6092931451.

The spelling of 6389393220 in words is "six billion, three hundred eighty-nine million, three hundred ninety-three thousand, two hundred twenty".