268384649 has 4 divisors (see below), whose sum is σ = 289029636. Its totient is φ = 247739664.

The previous prime is 268384609. The next prime is 268384651. The reversal of 268384649 is 946483862.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 173185600 + 95199049 = 13160^2 + 9757^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268384649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 268384597 and 268384606.

It is not an unprimeable number, because it can be changed into a prime (268384609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10322474 + ... + 10322499.

It is an arithmetic number, because the mean of its divisors is an integer number (72257409).

Almost surely, 2^268384649 is an apocalyptic number.

It is an amenable number.

268384649 is a deficient number, since it is larger than the sum of its proper divisors (20644987).

268384649 is a wasteful number, since it uses less digits than its factorization.

268384649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20644986.

The product of its digits is 1990656, while the sum is 50.

The square root of 268384649 is about 16382.4494200348. The cubic root of 268384649 is about 645.0388767305.

The spelling of 268384649 in words is "two hundred sixty-eight million, three hundred eighty-four thousand, six hundred forty-nine".