289039956 has 24 divisors (see below), whose sum is σ = 680732640. Its totient is φ = 95445792.

The previous prime is 289039909. The next prime is 289039957. The reversal of 289039956 is 659930982.

It is a junction number, because it is equal to n+sod(n) for n = 289039899 and 289039908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289039957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111271 + ... + 113838.

It is an arithmetic number, because the mean of its divisors is an integer number (28363860).

Almost surely, 2^289039956 is an apocalyptic number.

It is an amenable number.

289039956 is an abundant number, since it is smaller than the sum of its proper divisors (391692684).

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

289039956 is a wasteful number, since it uses less digits than its factorization.

289039956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225223 (or 225221 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 51.

The square root of 289039956 is about 17001.1751358546. The cubic root of 289039956 is about 661.1793697214.

The spelling of 289039956 in words is "two hundred eighty-nine million, thirty-nine thousand, nine hundred fifty-six".