1266923344 has 40 divisors (see below), whose sum is σ = 2593226880. Its totient is φ = 597945600.

The previous prime is 1266923341. The next prime is 1266923387. The reversal of 1266923344 is 4433296621.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1266923297 and 1266923306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266923341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78009 + ... + 92839.

It is an arithmetic number, because the mean of its divisors is an integer number (64830672).

Almost surely, 2^1266923344 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 1266923344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1296613440).

1266923344 is an abundant number, since it is smaller than the sum of its proper divisors (1326303536).

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

1266923344 is a wasteful number, since it uses less digits than its factorization.

1266923344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15139 (or 15133 counting only the distinct ones).

The product of its digits is 186624, while the sum is 40.

The square root of 1266923344 is about 35593.8666626710. The cubic root of 1266923344 is about 1082.0569349900.

The spelling of 1266923344 in words is "one billion, two hundred sixty-six million, nine hundred twenty-three thousand, three hundred forty-four".