6385967820 has 36 divisors (see below), whose sum is σ = 19370769600. Its totient is φ = 1702924704.

The previous prime is 6385967807. The next prime is 6385967831. The reversal of 6385967820 is 287695836.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17738620 + ... + 17738979.

Almost surely, 2^6385967820 is an apocalyptic number.

6385967820 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6385967820 is an abundant number, since it is smaller than the sum of its proper divisors (12984801780).

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

6385967820 is a wasteful number, since it uses less digits than its factorization.

6385967820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35477614 (or 35477609 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The square root of 6385967820 is about 79912.2507504325. The cubic root of 6385967820 is about 1855.2776320070.

It can be divided in two parts, 638596 and 7820, that added together give a square (646416 = 804²).

The spelling of 6385967820 in words is "six billion, three hundred eighty-five million, nine hundred sixty-seven thousand, eight hundred twenty".