268209644 has 24 divisors (see below), whose sum is σ = 485670528. Its totient is φ = 129467520.

The previous prime is 268209637. The next prime is 268209677. The reversal of 268209644 is 446902862.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 54302 + ... + 59034.

It is an arithmetic number, because the mean of its divisors is an integer number (20236272).

Almost surely, 2^268209644 is an apocalyptic number.

It is an amenable number.

268209644 is a deficient number, since it is larger than the sum of its proper divisors (217460884).

268209644 is a wasteful number, since it uses less digits than its factorization.

268209644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5225 (or 5223 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 41.

The square root of 268209644 is about 16377.1073147855. The cubic root of 268209644 is about 644.8986432085.

The spelling of 268209644 in words is "two hundred sixty-eight million, two hundred nine thousand, six hundred forty-four".