6339904020 has 144 divisors (see below), whose sum is σ = 20631461760. Its totient is φ = 1632306816.

The previous prime is 6339904019. The next prime is 6339904031. The reversal of 6339904020 is 204099336.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 118449 + ... + 163431.

It is an arithmetic number, because the mean of its divisors is an integer number (143274040).

Almost surely, 2^6339904020 is an apocalyptic number.

6339904020 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 6339904020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10315730880).

6339904020 is an abundant number, since it is smaller than the sum of its proper divisors (14291557740).

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

6339904020 is a wasteful number, since it uses less digits than its factorization.

6339904020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45036 (or 45022 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 36.

The square root of 6339904020 is about 79623.5142404554. The cubic root of 6339904020 is about 1850.8059814135.

The spelling of 6339904020 in words is "six billion, three hundred thirty-nine million, nine hundred four thousand, twenty".