1266976872 has 96 divisors (see below), whose sum is σ = 3995671680. Its totient is φ = 355155840.

The previous prime is 1266976861. The next prime is 1266976939. The reversal of 1266976872 is 2786796621.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2997 + ... + 50427.

It is an arithmetic number, because the mean of its divisors is an integer number (41621580).

Almost surely, 2^1266976872 is an apocalyptic number.

1266976872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1266976872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1997835840).

1266976872 is an abundant number, since it is smaller than the sum of its proper divisors (2728694808).

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

1266976872 is a wasteful number, since it uses less digits than its factorization.

1266976872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47503 (or 47496 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The square root of 1266976872 is about 35594.6185820273. The cubic root of 1266976872 is about 1082.0721738830.

The spelling of 1266976872 in words is "one billion, two hundred sixty-six million, nine hundred seventy-six thousand, eight hundred seventy-two".