1263413344 has 48 divisors (see below), whose sum is σ = 2638255536. Its totient is φ = 593510400.

The previous prime is 1263413329. The next prime is 1263413357. The reversal of 1263413344 is 4433143621.

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, 374224 + ... + 377584.

It is an arithmetic number, because the mean of its divisors is an integer number (54963657).

Almost surely, 2^1263413344 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 1263413344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1319127768).

1263413344 is an abundant number, since it is smaller than the sum of its proper divisors (1374842192).

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

1263413344 is a wasteful number, since it uses less digits than its factorization.

1263413344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4079 (or 4071 counting only the distinct ones).

The product of its digits is 20736, while the sum is 31.

The square root of 1263413344 is about 35544.5262171266. The cubic root of 1263413344 is about 1081.0567343258.

Adding to 1263413344 its reverse (4433143621), we get a palindrome (5696556965).

The spelling of 1263413344 in words is "one billion, two hundred sixty-three million, four hundred thirteen thousand, three hundred forty-four".