288222989 has 8 divisors (see below), whose sum is σ = 310793280. Its totient is φ = 266392800.

The previous prime is 288222983. The next prime is 288222997. The reversal of 288222989 is 989222882.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 288222989 - 2⁴ = 288222973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (288222983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184217 + ... + 185774.

It is an arithmetic number, because the mean of its divisors is an integer number (38849160).

Almost surely, 2^288222989 is an apocalyptic number.

It is an amenable number.

288222989 is a deficient number, since it is larger than the sum of its proper divisors (22570291).

288222989 is a wasteful number, since it uses less digits than its factorization.

288222989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370051.

The product of its digits is 663552, while the sum is 50.

The square root of 288222989 is about 16977.1313536769. The cubic root of 288222989 is about 660.5558441094. Note that the first 3 decimals are identical.

The spelling of 288222989 in words is "two hundred eighty-eight million, two hundred twenty-two thousand, nine hundred eighty-nine".