1267013888 has 72 divisors (see below), whose sum is σ = 2902152960. Its totient is φ = 540794880.

The previous prime is 1267013861. The next prime is 1267013897. The reversal of 1267013888 is 8883107621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 484328 + ... + 486936.

It is an arithmetic number, because the mean of its divisors is an integer number (40307680).

Almost surely, 2^1267013888 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 1267013888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1451076480).

1267013888 is an abundant number, since it is smaller than the sum of its proper divisors (1635139072).

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

1267013888 is an equidigital number, since it uses as much as digits as its factorization.

1267013888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2903 (or 2889 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 1267013888 is about 35595.1385444698. The cubic root of 1267013888 is about 1082.0827117216.

The spelling of 1267013888 in words is "one billion, two hundred sixty-seven million, thirteen thousand, eight hundred eighty-eight".