389281 has 4 divisors (see below), whose sum is σ = 391492. Its totient is φ = 387072.

The previous prime is 389273. The next prime is 389287. The reversal of 389281 is 182983.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 182983 = 41 ⋅4463.

It can be written as a sum of positive squares in 2 ways, for example, as 216225 + 173056 = 465^2 + 416^2 .

It is a cyclic number.

It is not a de Polignac number, because 389281 - 2³ = 389273 is a prime.

It is a super-2 number, since 2×389281² = 303079393922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 816 + ... + 1201.

It is an arithmetic number, because the mean of its divisors is an integer number (97873).

2³⁸⁹²⁸¹ is an apocalyptic number.

It is an amenable number.

389281 is a deficient number, since it is larger than the sum of its proper divisors (2211).

389281 is a wasteful number, since it uses less digits than its factorization.

389281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2210.

The product of its digits is 3456, while the sum is 31.

The square root of 389281 is about 623.9238735615. The cubic root of 389281 is about 73.0165096830.

The spelling of 389281 in words is "three hundred eighty-nine thousand, two hundred eighty-one".