389730 has 32 divisors (see below), whose sum is σ = 1021248. Its totient is φ = 94400.

The previous prime is 389723. The next prime is 389743. The reversal of 389730 is 37983.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

389730 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 261 + ... + 920.

It is an arithmetic number, because the mean of its divisors is an integer number (31914).

2³⁸⁹⁷³⁰ is an apocalyptic number.

389730 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

389730 is an abundant number, since it is smaller than the sum of its proper divisors (631518).

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

389730 is a wasteful number, since it uses less digits than its factorization.

389730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 389730 is about 624.2835894047. The cubic root of 389730 is about 73.0445715170.

The spelling of 389730 in words is "three hundred eighty-nine thousand, seven hundred thirty".