389418813 has 64 divisors (see below), whose sum is σ = 734976000. Its totient is φ = 198381312.

The previous prime is 389418797. The next prime is 389418817. The reversal of 389418813 is 318814983.

It is not a de Polignac number, because 389418813 - 2⁴ = 389418797 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389418817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 57858 + ... + 64236.

It is an arithmetic number, because the mean of its divisors is an integer number (11484000).

Almost surely, 2^389418813 is an apocalyptic number.

It is an amenable number.

389418813 is a deficient number, since it is larger than the sum of its proper divisors (345557187).

389418813 is a wasteful number, since it uses less digits than its factorization.

389418813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6431 (or 6425 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 389418813 is about 19733.6973981056. The cubic root of 389418813 is about 730.2512508513.

The spelling of 389418813 in words is "three hundred eighty-nine million, four hundred eighteen thousand, eight hundred thirteen".