6389018220 has 48 divisors (see below), whose sum is σ = 19265349600. Its totient is φ = 1572681216.

The previous prime is 6389018219. The next prime is 6389018243. The reversal of 6389018220 is 228109836.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4094745 + ... + 4096304.

It is an arithmetic number, because the mean of its divisors is an integer number (401361450).

Almost surely, 2^6389018220 is an apocalyptic number.

6389018220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6389018220 is an abundant number, since it is smaller than the sum of its proper divisors (12876331380).

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

6389018220 is a wasteful number, since it uses less digits than its factorization.

6389018220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8191074 (or 8191072 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 6389018220 is about 79931.3344064767. The cubic root of 6389018220 is about 1855.5729899013.

The spelling of 6389018220 in words is "six billion, three hundred eighty-nine million, eighteen thousand, two hundred twenty".