389784 has 32 divisors (see below), whose sum is σ = 990000. Its totient is φ = 127872.

The previous prime is 389783. The next prime is 389791. The reversal of 389784 is 487983.

389784 = T₂₄ + T₂₅ + ... + T₁₃₂.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389783) 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, 2542 + ... + 2690.

2³⁸⁹⁷⁸⁴ is an apocalyptic number.

It is an amenable number.

389784 is an abundant number, since it is smaller than the sum of its proper divisors (600216).

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

389784 is a wasteful number, since it uses less digits than its factorization.

389784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267 (or 263 counting only the distinct ones).

The product of its digits is 48384, while the sum is 39.

The square root of 389784 is about 624.3268374818. The cubic root of 389784 is about 73.0479449847.

The spelling of 389784 in words is "three hundred eighty-nine thousand, seven hundred eighty-four".