1266044940 has 36 divisors (see below), whose sum is σ = 3840336864. Its totient is φ = 337611936.

The previous prime is 1266044921. The next prime is 1266044957. The reversal of 1266044940 is 494406621.

1266044940 is a `hidden beast` number, since 1 + 2 + 6 + 604 + 4 + 9 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1266044895 and 1266044904.

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 11 ways as a sum of consecutive naturals, for example, 3516612 + ... + 3516971.

It is an arithmetic number, because the mean of its divisors is an integer number (106676024).

Almost surely, 2^1266044940 is an apocalyptic number.

1266044940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1266044940 is an abundant number, since it is smaller than the sum of its proper divisors (2574291924).

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

1266044940 is a wasteful number, since it uses less digits than its factorization.

1266044940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7033598 (or 7033593 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 1266044940 is about 35581.5252624167. The cubic root of 1266044940 is about 1081.8068007054.

It can be divided in two parts, 12660 and 44940, that added together give a square (57600 = 240²).

The spelling of 1266044940 in words is "one billion, two hundred sixty-six million, forty-four thousand, nine hundred forty".