1263933216 has 288 divisors, whose sum is σ = 4579061760. Its totient is φ = 321656832.

The previous prime is 1263933197. The next prime is 1263933239. The reversal of 1263933216 is 6123393621.

It is a happy number.

1263933216 is a `hidden beast` number, since 1 + 2 + 639 + 3 + 3 + 2 + 16 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 759201 + ... + 760863.

It is an arithmetic number, because the mean of its divisors is an integer number (15899520).

Almost surely, 2^1263933216 is an apocalyptic number.

1263933216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1263933216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2289530880).

1263933216 is an abundant number, since it is smaller than the sum of its proper divisors (3315128544).

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

1263933216 is a wasteful number, since it uses less digits than its factorization.

1263933216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1728 (or 1717 counting only the distinct ones).

The product of its digits is 34992, while the sum is 36.

The square root of 1263933216 is about 35551.8384334763. The cubic root of 1263933216 is about 1081.2049924977.

The spelling of 1263933216 in words is "one billion, two hundred sixty-three million, nine hundred thirty-three thousand, two hundred sixteen".