389644563 has 24 divisors (see below), whose sum is σ = 652632064. Its totient is φ = 202411440.

The previous prime is 389644561. The next prime is 389644583. The reversal of 389644563 is 365446983.

It is not a de Polignac number, because 389644563 - 2¹ = 389644561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (389644561) by changing a digit.

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 in 23 ways as a sum of consecutive naturals, for example, 74131 + ... + 79212.

Almost surely, 2^389644563 is an apocalyptic number.

389644563 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

389644563 is a deficient number, since it is larger than the sum of its proper divisors (262987501).

389644563 is a wasteful number, since it uses less digits than its factorization.

389644563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153375 (or 153364 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 48.

The square root of 389644563 is about 19739.4164807372. The cubic root of 389644563 is about 730.3923349222.

The spelling of 389644563 in words is "three hundred eighty-nine million, six hundred forty-four thousand, five hundred sixty-three".