389128808 has 8 divisors (see below), whose sum is σ = 729616530. Its totient is φ = 194564400.

The previous prime is 389128787. The next prime is 389128829. The reversal of 389128808 is 808821983.

It is an interprime number because it is at equal distance from previous prime (389128787) and next prime (389128829).

It can be written as a sum of positive squares in only one way, i.e., 387381124 + 1747684 = 19682^2 + 1322^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24320543 + ... + 24320558.

Almost surely, 2^389128808 is an apocalyptic number.

It is an amenable number.

389128808 is a deficient number, since it is larger than the sum of its proper divisors (340487722).

389128808 is a wasteful number, since it uses less digits than its factorization.

389128808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48641107 (or 48641103 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 47.

The square root of 389128808 is about 19726.3480654682. The cubic root of 389128808 is about 730.0699301245.

The spelling of 389128808 in words is "three hundred eighty-nine million, one hundred twenty-eight thousand, eight hundred eight".