289642 has 8 divisors (see below), whose sum is σ = 439236. Its totient is φ = 143232.

The previous prime is 289637. The next prime is 289643. The reversal of 289642 is 246982.

It can be written as a sum of positive squares in 2 ways, for example, as 279841 + 9801 = 529^2 + 99^2 .

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

It is a plaindrome in base 14.

It is a zygodrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (289643) by changing a digit.

289642 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, 553 + ... + 940.

2²⁸⁹⁶⁴² is an apocalyptic number.

289642 is a deficient number, since it is larger than the sum of its proper divisors (149594).

289642 is a wasteful number, since it uses less digits than its factorization.

289642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1592.

The product of its digits is 6912, while the sum is 31.

The square root of 289642 is about 538.1839834109. The cubic root of 289642 is about 66.1638110240.

The spelling of 289642 in words is "two hundred eighty-nine thousand, six hundred forty-two".