389031 has 8 divisors (see below), whose sum is σ = 524160. Its totient is φ = 256632.

The previous prime is 389029. The next prime is 389041. The reversal of 389031 is 130983.

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

It is not a de Polignac number, because 389031 - 2¹ = 389029 is a prime.

It is a super-2 number, since 2×389031² = 302690237922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

389031 is a lucky number.

It is a nialpdrome in base 5.

It is a zygodrome in base 5.

It is a junction number, because it is equal to n+sod(n) for n = 388992 and 389010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389041) 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, 321 + ... + 938.

It is an arithmetic number, because the mean of its divisors is an integer number (65520).

2³⁸⁹⁰³¹ is an apocalyptic number.

389031 is a deficient number, since it is larger than the sum of its proper divisors (135129).

389031 is a wasteful number, since it uses less digits than its factorization.

389031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 389031 is about 623.7234964309. The cubic root of 389031 is about 73.0008757010. Note that the first 3 decimals are identical.

The spelling of 389031 in words is "three hundred eighty-nine thousand, thirty-one".