389811 has 4 divisors (see below), whose sum is σ = 519752. Its totient is φ = 259872.

The previous prime is 389797. The next prime is 389819. The reversal of 389811 is 118983.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 389811 - 2⁹ = 389299 is a prime.

It is a D-number.

It is a Duffinian number.

389811 is a lucky number.

It is a nialpdrome in base 5.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 389811.

It is not an unprimeable number, because it can be changed into a prime (389819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64966 + ... + 64971.

It is an arithmetic number, because the mean of its divisors is an integer number (129938).

2³⁸⁹⁸¹¹ is an apocalyptic number.

389811 is a deficient number, since it is larger than the sum of its proper divisors (129941).

389811 is a wasteful number, since it uses less digits than its factorization.

389811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129940.

The product of its digits is 1728, while the sum is 30.

The square root of 389811 is about 624.3484603969. The cubic root of 389811 is about 73.0496316017.

The spelling of 389811 in words is "three hundred eighty-nine thousand, eight hundred eleven".