389021 has 8 divisors (see below), whose sum is σ = 406560. Its totient is φ = 371952.

The previous prime is 389003. The next prime is 389023. The reversal of 389021 is 120983.

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

It is a cyclic number.

It is not a de Polignac number, because 389021 - 2¹⁴ = 372637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389023) 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, 3515 + ... + 3623.

It is an arithmetic number, because the mean of its divisors is an integer number (50820).

2³⁸⁹⁰²¹ is an apocalyptic number.

It is an amenable number.

389021 is a deficient number, since it is larger than the sum of its proper divisors (17539).

389021 is a wasteful number, since it uses less digits than its factorization.

389021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 389021 is about 623.7154800067. The cubic root of 389021 is about 73.0002502024. Note that the first 3 decimals are identical.

The spelling of 389021 in words is "three hundred eighty-nine thousand, twenty-one".