389445 has 16 divisors (see below), whose sum is σ = 712320. Its totient is φ = 177984.

The previous prime is 389437. The next prime is 389447. The reversal of 389445 is 544983.

389445 = 88² + 89² + ... + 122².

It is not a de Polignac number, because 389445 - 2³ = 389437 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 389445.

It is not an unprimeable number, because it can be changed into a prime (389447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1750 + ... + 1959.

It is an arithmetic number, because the mean of its divisors is an integer number (44520).

2³⁸⁹⁴⁴⁵ is an apocalyptic number.

389445 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

389445 is a deficient number, since it is larger than the sum of its proper divisors (322875).

389445 is a wasteful number, since it uses less digits than its factorization.

389445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3724.

The product of its digits is 17280, while the sum is 33.

The square root of 389445 is about 624.0552860124. The cubic root of 389445 is about 73.0267619399.

The spelling of 389445 in words is "three hundred eighty-nine thousand, four hundred forty-five".