1269493648 has 80 divisors (see below), whose sum is σ = 2665829376. Its totient is φ = 583925760.

The previous prime is 1269493633. The next prime is 1269493661. The reversal of 1269493648 is 8463949621.

It is a super-2 number, since 2×1269493648² = 3223228244624695808, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1269493595 and 1269493604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2931640 + ... + 2932072.

Almost surely, 2^1269493648 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 1269493648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1332914688).

1269493648 is an abundant number, since it is smaller than the sum of its proper divisors (1396335728).

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

1269493648 is a wasteful number, since it uses less digits than its factorization.

1269493648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752 (or 746 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 52.

The square root of 1269493648 is about 35629.9543642705. The cubic root of 1269493648 is about 1082.7881911672.

The spelling of 1269493648 in words is "one billion, two hundred sixty-nine million, four hundred ninety-three thousand, six hundred forty-eight".