387289 has 8 divisors (see below), whose sum is σ = 450368. Its totient is φ = 326160.

The previous prime is 387281. The next prime is 387307. The reversal of 387289 is 982783.

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 387289 - 2³ = 387281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27 + ... + 880.

It is an arithmetic number, because the mean of its divisors is an integer number (56296).

2³⁸⁷²⁸⁹ is an apocalyptic number.

It is an amenable number.

387289 is a deficient number, since it is larger than the sum of its proper divisors (63079).

387289 is an equidigital number, since it uses as much as digits as its factorization.

387289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975.

The product of its digits is 24192, while the sum is 37.

The square root of 387289 is about 622.3254775437. The cubic root of 387289 is about 72.8917517417.

It can be divided in two parts, 387 and 289, that added together give a palindrome (676).

The spelling of 387289 in words is "three hundred eighty-seven thousand, two hundred eighty-nine".