6398842989 has 16 divisors (see below), whose sum is σ = 10637038080. Its totient is φ = 3324074160.

The previous prime is 6398842969. The next prime is 6398842999. The reversal of 6398842989 is 9892488936.

It is not a de Polignac number, because 6398842989 - 2⁷ = 6398842861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6398842909) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 13850079 + ... + 13850540.

It is an arithmetic number, because the mean of its divisors is an integer number (664814880).

Almost surely, 2^6398842989 is an apocalyptic number.

It is an amenable number.

6398842989 is a deficient number, since it is larger than the sum of its proper divisors (4238195091).

6398842989 is a wasteful number, since it uses less digits than its factorization.

6398842989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27700640.

The product of its digits is 53747712, while the sum is 66.

The square root of 6398842989 is about 79992.7683543956. The cubic root of 6398842989 is about 1856.5236440077.

The spelling of 6398842989 in words is "six billion, three hundred ninety-eight million, eight hundred forty-two thousand, nine hundred eighty-nine".