389770 has 8 divisors (see below), whose sum is σ = 701604. Its totient is φ = 155904.

The previous prime is 389761. The next prime is 389773. The reversal of 389770 is 77983.

It can be written as a sum of positive squares in 2 ways, for example, as 346921 + 42849 = 589^2 + 207^2 .

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

It is not an unprimeable number, because it can be changed into a prime (389773) by changing a digit.

389770 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 3 ways as a sum of consecutive naturals, for example, 19479 + ... + 19498.

2³⁸⁹⁷⁷⁰ is an apocalyptic number.

389770 is a deficient number, since it is larger than the sum of its proper divisors (311834).

389770 is a wasteful number, since it uses less digits than its factorization.

389770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38984.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 389770 is about 624.3156253050. The cubic root of 389770 is about 73.0470704118.

The spelling of 389770 in words is "three hundred eighty-nine thousand, seven hundred seventy".