1268745728 has 40 divisors (see below), whose sum is σ = 2552180400. Its totient is φ = 630077440.

The previous prime is 1268745707. The next prime is 1268745733. The reversal of 1268745728 is 8275478621.

It is a congruent number.

It is an unprimeable number.

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, 67973 + ... + 84603.

It is an arithmetic number, because the mean of its divisors is an integer number (63804510).

Almost surely, 2^1268745728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1268745728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1276090200).

1268745728 is an abundant number, since it is smaller than the sum of its proper divisors (1283434672).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1268745728 is an equidigital number, since it uses as much as digits as its factorization.

1268745728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16798 (or 16782 counting only the distinct ones).

The product of its digits is 1505280, while the sum is 50.

The square root of 1268745728 is about 35619.4571547630. The cubic root of 1268745728 is about 1082.5755084608.

The spelling of 1268745728 in words is "one billion, two hundred sixty-eight million, seven hundred forty-five thousand, seven hundred twenty-eight".