389257 has 6 divisors (see below), whose sum is σ = 427994. Its totient is φ = 353760.

The previous prime is 389231. The next prime is 389269. The reversal of 389257 is 752983.

It can be written as a sum of positive squares in only one way, i.e., 379456 + 9801 = 616^2 + 99^2 .

It is a de Polignac number, because none of the positive numbers 2^k-389257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389227) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1488 + ... + 1729.

2³⁸⁹²⁵⁷ is an apocalyptic number.

It is an amenable number.

389257 is a deficient number, since it is larger than the sum of its proper divisors (38737).

389257 is a wasteful number, since it uses less digits than its factorization.

389257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3239 (or 3228 counting only the distinct ones).

The product of its digits is 15120, while the sum is 34.

The square root of 389257 is about 623.9046401494. The cubic root of 389257 is about 73.0150091113.

It can be divided in two parts, 389 and 257, that added together give a palindrome (646).

The spelling of 389257 in words is "three hundred eighty-nine thousand, two hundred fifty-seven".