289742 has 8 divisors (see below), whose sum is σ = 437016. Its totient is φ = 144072.

The previous prime is 289741. The next prime is 289759. The reversal of 289742 is 247982.

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

It is an Ulam number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 289699 and 289708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289741) 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 3 ways as a sum of consecutive naturals, for example, 293 + ... + 815.

It is an arithmetic number, because the mean of its divisors is an integer number (54627).

2²⁸⁹⁷⁴² is an apocalyptic number.

289742 is a deficient number, since it is larger than the sum of its proper divisors (147274).

289742 is a wasteful number, since it uses less digits than its factorization.

289742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802.

The product of its digits is 8064, while the sum is 32.

The square root of 289742 is about 538.2768804249. The cubic root of 289742 is about 66.1714245835.

The spelling of 289742 in words is "two hundred eighty-nine thousand, seven hundred forty-two".