389765 has 8 divisors (see below), whose sum is σ = 471960. Its totient is φ = 308992.

The previous prime is 389761. The next prime is 389773. The reversal of 389765 is 567983.

It can be written as a sum of positive squares in 4 ways, for example, as 12769 + 376996 = 113^2 + 614^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 389765 - 2² = 389761 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389761) 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, 401 + ... + 969.

It is an arithmetic number, because the mean of its divisors is an integer number (58995).

2³⁸⁹⁷⁶⁵ is an apocalyptic number.

It is an amenable number.

389765 is a deficient number, since it is larger than the sum of its proper divisors (82195).

389765 is a wasteful number, since it uses less digits than its factorization.

389765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711.

The product of its digits is 45360, while the sum is 38.

The square root of 389765 is about 624.3116209074. The cubic root of 389765 is about 73.0467580593.

The spelling of 389765 in words is "three hundred eighty-nine thousand, seven hundred sixty-five".