1267663944 has 64 divisors (see below), whose sum is σ = 3211591680. Its totient is φ = 416936000.

The previous prime is 1267663937. The next prime is 1267663949. The reversal of 1267663944 is 4493667621.

It is a junction number, because it is equal to n+sod(n) for n = 1267663893 and 1267663902.

It is not an unprimeable number, because it can be changed into a prime (1267663949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 599449 + ... + 601559.

It is an arithmetic number, because the mean of its divisors is an integer number (50181120).

Almost surely, 2^1267663944 is an apocalyptic number.

It is an amenable number.

1267663944 is an abundant number, since it is smaller than the sum of its proper divisors (1943927736).

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

1267663944 is a wasteful number, since it uses less digits than its factorization.

1267663944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2442 (or 2438 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 48.

The square root of 1267663944 is about 35604.2686204899. The cubic root of 1267663944 is about 1082.2677383952.

The spelling of 1267663944 in words is "one billion, two hundred sixty-seven million, six hundred sixty-three thousand, nine hundred forty-four".