289094442 has 80 divisors (see below), whose sum is σ = 718821312. Its totient is φ = 75928320.

The previous prime is 289094441. The next prime is 289094453. The reversal of 289094442 is 244490982.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 289094394 and 289094403.

It is not an unprimeable number, because it can be changed into a prime (289094441) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1199442 + ... + 1199682.

Almost surely, 2^289094442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 289094442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (359410656).

289094442 is an abundant number, since it is smaller than the sum of its proper divisors (429726870).

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

289094442 is an equidigital number, since it uses as much as digits as its factorization.

289094442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 289094442 is about 17002.7774789885. Note that the first 3 decimals coincide. The cubic root of 289094442 is about 661.2209127157.

The spelling of 289094442 in words is "two hundred eighty-nine million, ninety-four thousand, four hundred forty-two".