289436238 has 72 divisors (see below), whose sum is σ = 785643768. Its totient is φ = 76331808.

The previous prime is 289436221. The next prime is 289436239. The reversal of 289436238 is 832634982.

289436238 is a `hidden beast` number, since 289 + 4 + 362 + 3 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 289436193 and 289436202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289436239) 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 35 ways as a sum of consecutive naturals, for example, 1156 + ... + 24087.

It is an arithmetic number, because the mean of its divisors is an integer number (10911719).

Almost surely, 2^289436238 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 289436238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (392821884).

289436238 is an abundant number, since it is smaller than the sum of its proper divisors (496207530).

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

289436238 is a wasteful number, since it uses less digits than its factorization.

289436238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25278 (or 25268 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The square root of 289436238 is about 17012.8256912248. The cubic root of 289436238 is about 661.4813969741.

The spelling of 289436238 in words is "two hundred eighty-nine million, four hundred thirty-six thousand, two hundred thirty-eight".