268043647 has 4 divisors (see below), whose sum is σ = 269390800. Its totient is φ = 266696496.

The previous prime is 268043599. The next prime is 268043669. The reversal of 268043647 is 746340862.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268043647 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268043147) 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, 673278 + ... + 673675.

It is an arithmetic number, because the mean of its divisors is an integer number (67347700).

Almost surely, 2^268043647 is an apocalyptic number.

268043647 is a deficient number, since it is larger than the sum of its proper divisors (1347153).

268043647 is a wasteful number, since it uses less digits than its factorization.

268043647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347152.

The product of its (nonzero) digits is 193536, while the sum is 40.

The square root of 268043647 is about 16372.0385719067. The cubic root of 268043647 is about 644.7655715175.

The spelling of 268043647 in words is "two hundred sixty-eight million, forty-three thousand, six hundred forty-seven".