268444709 has 4 divisors (see below), whose sum is σ = 289094316. Its totient is φ = 247795104.

The previous prime is 268444699. The next prime is 268444727. The reversal of 268444709 is 907444862.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 907444862 = 2 ⋅453722431.

It can be written as a sum of positive squares in 2 ways, for example, as 60450625 + 207994084 = 7775^2 + 14422^2 .

It is a cyclic number.

It is not a de Polignac number, because 268444709 - 2¹⁶ = 268379173 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 268444709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268444789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10324784 + ... + 10324809.

It is an arithmetic number, because the mean of its divisors is an integer number (72273579).

Almost surely, 2^268444709 is an apocalyptic number.

It is an amenable number.

268444709 is a deficient number, since it is larger than the sum of its proper divisors (20649607).

268444709 is a wasteful number, since it uses less digits than its factorization.

268444709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20649606.

The product of its (nonzero) digits is 387072, while the sum is 44.

The square root of 268444709 is about 16384.2823767170. The cubic root of 268444709 is about 645.0869894493.

The spelling of 268444709 in words is "two hundred sixty-eight million, four hundred forty-four thousand, seven hundred nine".