1266087328 has 48 divisors (see below), whose sum is σ = 2726783136. Its totient is φ = 573891840.

The previous prime is 1266087323. The next prime is 1266087331. The reversal of 1266087328 is 8237806621.

It is not an unprimeable number, because it can be changed into a prime (1266087323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126475 + ... + 136117.

It is an arithmetic number, because the mean of its divisors is an integer number (56807982).

Almost surely, 2^1266087328 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 1266087328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1363391568).

1266087328 is an abundant number, since it is smaller than the sum of its proper divisors (1460695808).

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

1266087328 is a wasteful number, since it uses less digits than its factorization.

1266087328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10037 (or 10029 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 1266087328 is about 35582.1209036224. The cubic root of 1266087328 is about 1081.8188737668.

The spelling of 1266087328 in words is "one billion, two hundred sixty-six million, eighty-seven thousand, three hundred twenty-eight".