288268109 has 8 divisors (see below), whose sum is σ = 289590840. Its totient is φ = 286949376.

The previous prime is 288268051. The next prime is 288268111. The reversal of 288268109 is 901862882.

It can be written as a sum of positive squares in 4 ways, for example, as 15625 + 288252484 = 125^2 + 16978^2 .

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 288268109 - 2¹² = 288264013 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 288268109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (288268129) 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, 374477 + ... + 375245.

It is an arithmetic number, because the mean of its divisors is an integer number (36198855).

Almost surely, 2^288268109 is an apocalyptic number.

It is an amenable number.

288268109 is a deficient number, since it is larger than the sum of its proper divisors (1322731).

288268109 is an equidigital number, since it uses as much as digits as its factorization.

288268109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999.

The product of its (nonzero) digits is 110592, while the sum is 44.

The square root of 288268109 is about 16978.4601480817. The cubic root of 288268109 is about 660.5903113168.

The spelling of 288268109 in words is "two hundred eighty-eight million, two hundred sixty-eight thousand, one hundred nine".