1268788026 has 64 divisors (see below), whose sum is σ = 2864848896. Its totient is φ = 371131200.

The previous prime is 1268787997. The next prime is 1268788117. The reversal of 1268788026 is 6208878621.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1487016 + ... + 1487868.

It is an arithmetic number, because the mean of its divisors is an integer number (44763264).

Almost surely, 2^1268788026 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1268788026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1432424448).

1268788026 is an abundant number, since it is smaller than the sum of its proper divisors (1596060870).

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

1268788026 is a wasteful number, since it uses less digits than its factorization.

1268788026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1627.

The product of its (nonzero) digits is 516096, while the sum is 48.

The square root of 1268788026 is about 35620.0508983353. The cubic root of 1268788026 is about 1082.5875387857.

The spelling of 1268788026 in words is "one billion, two hundred sixty-eight million, seven hundred eighty-eight thousand, twenty-six".