389724 has 24 divisors (see below), whose sum is σ = 930048. Its totient is φ = 126960.

The previous prime is 389723. The next prime is 389743. The reversal of 389724 is 427983.

389724 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219 + ... + 909.

It is an arithmetic number, because the mean of its divisors is an integer number (38752).

2³⁸⁹⁷²⁴ is an apocalyptic number.

It is an amenable number.

389724 is an abundant number, since it is smaller than the sum of its proper divisors (540324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

389724 is a wasteful number, since it uses less digits than its factorization.

389724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745 (or 743 counting only the distinct ones).

The product of its digits is 12096, while the sum is 33.

The square root of 389724 is about 624.2787838778. The cubic root of 389724 is about 73.0441966680.

It can be divided in two parts, 3897 and 24, that multiplied together give a triangular number (93528 = T₄₃₂).

The spelling of 389724 in words is "three hundred eighty-nine thousand, seven hundred twenty-four".