389831 has 8 divisors (see below), whose sum is σ = 424704. Its totient is φ = 355680.

The previous prime is 389819. The next prime is 389839. The reversal of 389831 is 138983.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 389831 - 2¹⁴ = 373447 is a prime.

It is a super-2 number, since 2×389831² = 303936417122, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 5.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1946 + ... + 2136.

It is an arithmetic number, because the mean of its divisors is an integer number (53088).

2³⁸⁹⁸³¹ is an apocalyptic number.

389831 is a deficient number, since it is larger than the sum of its proper divisors (34873).

389831 is a wasteful number, since it uses less digits than its factorization.

389831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361.

The product of its digits is 5184, while the sum is 32.

The square root of 389831 is about 624.3644768883. The cubic root of 389831 is about 73.0508808974.

The spelling of 389831 in words is "three hundred eighty-nine thousand, eight hundred thirty-one".