389871 has 6 divisors (see below), whose sum is σ = 563160. Its totient is φ = 259908.

The previous prime is 389867. The next prime is 389891. The reversal of 389871 is 178983.

It is not a de Polignac number, because 389871 - 2² = 389867 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389891) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21651 + ... + 21668.

It is an arithmetic number, because the mean of its divisors is an integer number (93860).

2³⁸⁹⁸⁷¹ is an apocalyptic number.

389871 is a deficient number, since it is larger than the sum of its proper divisors (173289).

389871 is a wasteful number, since it uses less digits than its factorization.

389871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43325 (or 43322 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 389871 is about 624.3965086385. The cubic root of 389871 is about 73.0533793607.

It can be divided in two parts, 3898 and 71, that added together give a square (3969 = 63²).

The spelling of 389871 in words is "three hundred eighty-nine thousand, eight hundred seventy-one".