389144678 has 64 divisors (see below), whose sum is σ = 677376000. Its totient is φ = 166368384.

The previous prime is 389144669. The next prime is 389144683. The reversal of 389144678 is 876441983.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2799533 + ... + 2799671.

It is an arithmetic number, because the mean of its divisors is an integer number (10584000).

Almost surely, 2^389144678 is an apocalyptic number.

389144678 is a deficient number, since it is larger than the sum of its proper divisors (288231322).

389144678 is a wasteful number, since it uses less digits than its factorization.

389144678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309.

The product of its digits is 1161216, while the sum is 50.

The square root of 389144678 is about 19726.7503152445. The cubic root of 389144678 is about 730.0798549035.

The spelling of 389144678 in words is "three hundred eighty-nine million, one hundred forty-four thousand, six hundred seventy-eight".