6398871020 has 24 divisors (see below), whose sum is σ = 13800809904. Its totient is φ = 2490371136.

The previous prime is 6398870999. The next prime is 6398871079. The reversal of 6398871020 is 201788936.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4322822 + ... + 4324301.

It is an arithmetic number, because the mean of its divisors is an integer number (575033746).

Almost surely, 2^6398871020 is an apocalyptic number.

It is an amenable number.

6398871020 is an abundant number, since it is smaller than the sum of its proper divisors (7401938884).

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

6398871020 is a wasteful number, since it uses less digits than its factorization.

6398871020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8647169 (or 8647167 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 6398871020 is about 79992.9435637919. The cubic root of 6398871020 is about 1856.5263549217.

The spelling of 6398871020 in words is "six billion, three hundred ninety-eight million, eight hundred seventy-one thousand, twenty".