289780242 has 16 divisors (see below), whose sum is σ = 579759552. Its totient is φ = 96560240.

The previous prime is 289780201. The next prime is 289780247. The reversal of 289780242 is 242087982.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 289780194 and 289780203.

It is not an unprimeable number, because it can be changed into a prime (289780247) 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, 16192 + ... + 29012.

It is an arithmetic number, because the mean of its divisors is an integer number (36234972).

Almost surely, 2^289780242 is an apocalyptic number.

289780242 is an abundant number, since it is smaller than the sum of its proper divisors (289979310).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

289780242 is a wasteful number, since it uses less digits than its factorization.

289780242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16593.

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 289780242 is about 17022.9328260438. The cubic root of 289780242 is about 661.7433569790.

The spelling of 289780242 in words is "two hundred eighty-nine million, seven hundred eighty thousand, two hundred forty-two".