289540918 has 4 divisors (see below), whose sum is σ = 434311380. Its totient is φ = 144770458.

The previous prime is 289540903. The next prime is 289540919. The reversal of 289540918 is 819045982.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 819045982 = 2 ⋅409522991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289540919) 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 as a sum of consecutive naturals, namely, 72385228 + ... + 72385231.

It is an arithmetic number, because the mean of its divisors is an integer number (108577845).

Almost surely, 2^289540918 is an apocalyptic number.

289540918 is a deficient number, since it is larger than the sum of its proper divisors (144770462).

289540918 is a wasteful number, since it uses less digits than its factorization.

289540918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144770461.

The product of its (nonzero) digits is 207360, while the sum is 46.

The square root of 289540918 is about 17015.9019155612. The cubic root of 289540918 is about 661.5611330466.

The spelling of 289540918 in words is "two hundred eighty-nine million, five hundred forty thousand, nine hundred eighteen".