1144647168 has 160 divisors (see below), whose sum is σ = 3606197760. Its totient is φ = 315678720.

The previous prime is 1144647157. The next prime is 1144647199. The reversal of 1144647168 is 8617464411.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

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 15 ways as a sum of consecutive naturals, for example, 309973 + ... + 313643.

It is an arithmetic number, because the mean of its divisors is an integer number (22538736).

Almost surely, 2^1144647168 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 1144647168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1803098880).

1144647168 is an abundant number, since it is smaller than the sum of its proper divisors (2461550592).

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

1144647168 is an equidigital number, since it uses as much as digits as its factorization.

1144647168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3728 (or 3712 counting only the distinct ones).

The product of its digits is 129024, while the sum is 42.

The square root of 1144647168 is about 33832.6346594527. The cubic root of 1144647168 is about 1046.0614865140.

The spelling of 1144647168 in words is "one billion, one hundred forty-four million, six hundred forty-seven thousand, one hundred sixty-eight".