288422639 has 4 divisors (see below), whose sum is σ = 288668040. Its totient is φ = 288177240.

The previous prime is 288422627. The next prime is 288422647. The reversal of 288422639 is 936224882.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 288422639 - 2¹⁶ = 288357103 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 288422639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (288422689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120929 + ... + 123290.

It is an arithmetic number, because the mean of its divisors is an integer number (72167010).

Almost surely, 2^288422639 is an apocalyptic number.

288422639 is a deficient number, since it is larger than the sum of its proper divisors (245401).

288422639 is a wasteful number, since it uses less digits than its factorization.

288422639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245400.

The product of its digits is 331776, while the sum is 44.

The square root of 288422639 is about 16983.0103044189. The cubic root of 288422639 is about 660.7083296735.

The spelling of 288422639 in words is "two hundred eighty-eight million, four hundred twenty-two thousand, six hundred thirty-nine".