1268693816 has 96 divisors (see below), whose sum is σ = 2751148800. Its totient is φ = 548221440.

The previous prime is 1268693759. The next prime is 1268693819. The reversal of 1268693816 is 6183968621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268693819) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6642281 + ... + 6642471.

It is an arithmetic number, because the mean of its divisors is an integer number (28657800).

Almost surely, 2^1268693816 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 1268693816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1375574400).

1268693816 is an abundant number, since it is smaller than the sum of its proper divisors (1482454984).

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

1268693816 is a wasteful number, since it uses less digits than its factorization.

1268693816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274 (or 223 counting only the distinct ones).

The product of its digits is 746496, while the sum is 50.

The square root of 1268693816 is about 35618.7284444574. The cubic root of 1268693816 is about 1082.5607433730.

The spelling of 1268693816 in words is "one billion, two hundred sixty-eight million, six hundred ninety-three thousand, eight hundred sixteen".