1268943472 has 20 divisors (see below), whose sum is σ = 2498884456. Its totient is φ = 624070080.

The previous prime is 1268943469. The next prime is 1268943479. The reversal of 1268943472 is 2743498621.

It is a happy number.

It is a super-2 number, since 2×1268943472² = 3220435070262829568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268943479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 649098 + ... + 651049.

Almost surely, 2^1268943472 is an apocalyptic number.

It is an amenable number.

1268943472 is a deficient number, since it is larger than the sum of its proper divisors (1229940984).

1268943472 is a wasteful number, since it uses less digits than its factorization.

1268943472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300216 (or 1300210 counting only the distinct ones).

The product of its digits is 580608, while the sum is 46.

The square root of 1268943472 is about 35622.2328328812. The cubic root of 1268943472 is about 1082.6317481748.

The spelling of 1268943472 in words is "one billion, two hundred sixty-eight million, nine hundred forty-three thousand, four hundred seventy-two".