1266868944 has 240 divisors, whose sum is σ = 4121432640. Its totient is φ = 369492480.

The previous prime is 1266868913. The next prime is 1266868949. The reversal of 1266868944 is 4498686621.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266868949) 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 47 ways as a sum of consecutive naturals, for example, 3996274 + ... + 3996590.

It is an arithmetic number, because the mean of its divisors is an integer number (17172636).

Almost surely, 2^1266868944 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 1266868944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2060716320).

1266868944 is an abundant number, since it is smaller than the sum of its proper divisors (2854563696).

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

1266868944 is a wasteful number, since it uses less digits than its factorization.

1266868944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403 (or 362 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 54.

The square root of 1266868944 is about 35593.1024778678. The cubic root of 1266868944 is about 1082.0414474074.

The spelling of 1266868944 in words is "one billion, two hundred sixty-six million, eight hundred sixty-eight thousand, nine hundred forty-four".