1144436688 has 140 divisors (see below), whose sum is σ = 3382878720. Its totient is φ = 374787648.

The previous prime is 1144436663. The next prime is 1144436779. The reversal of 1144436688 is 8866344411.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 687345 + ... + 689007.

Almost surely, 2^1144436688 is an apocalyptic number.

1144436688 is a gapful number since it is divisible by the number (18) 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 1144436688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1691439360).

1144436688 is an abundant number, since it is smaller than the sum of its proper divisors (2238442032).

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

1144436688 is an equidigital number, since it uses as much as digits as its factorization.

1144436688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1748 (or 1727 counting only the distinct ones).

The product of its digits is 442368, while the sum is 45.

The square root of 1144436688 is about 33829.5239103361. The cubic root of 1144436688 is about 1045.9973652941.

The spelling of 1144436688 in words is "one billion, one hundred forty-four million, four hundred thirty-six thousand, six hundred eighty-eight".