263844668 has 12 divisors (see below), whose sum is σ = 477650040. Its totient is φ = 127373232.

The previous prime is 263844667. The next prime is 263844671. The reversal of 263844668 is 866448362.

It is a super-2 number, since 2×263844668² = 139228017664060448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263844667) 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, 1137146 + ... + 1137377.

It is an arithmetic number, because the mean of its divisors is an integer number (39804170).

Almost surely, 2^263844668 is an apocalyptic number.

It is an amenable number.

263844668 is a deficient number, since it is larger than the sum of its proper divisors (213805372).

263844668 is a wasteful number, since it uses less digits than its factorization.

263844668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2274556 (or 2274554 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 47.

The square root of 263844668 is about 16243.2960940814. The cubic root of 263844668 is about 641.3810249711.

The spelling of 263844668 in words is "two hundred sixty-three million, eight hundred forty-four thousand, six hundred sixty-eight".