1229563944 has 96 divisors (see below), whose sum is σ = 3814200000. Its totient is φ = 350528256.

The previous prime is 1229563939. The next prime is 1229563957. The reversal of 1229563944 is 4493659221.

1229563944 is a `hidden beast` number, since 1 + 2 + 2 + 9 + 5 + 639 + 4 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1229563944.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 249052 + ... + 253940.

It is an arithmetic number, because the mean of its divisors is an integer number (39731250).

Almost surely, 2^1229563944 is an apocalyptic number.

1229563944 is a gapful number since it is divisible by the number (14) 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 1229563944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1907100000).

1229563944 is an abundant number, since it is smaller than the sum of its proper divisors (2584636056).

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

1229563944 is a wasteful number, since it uses less digits than its factorization.

1229563944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5407 (or 5400 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 1229563944 is about 35065.1385852102. The cubic root of 1229563944 is about 1071.3146399845.

The spelling of 1229563944 in words is "one billion, two hundred twenty-nine million, five hundred sixty-three thousand, nine hundred forty-four".