1147446144 has 192 divisors, whose sum is σ = 3765893040. Its totient is φ = 332218368.

The previous prime is 1147446133. The next prime is 1147446151. The reversal of 1147446144 is 4416447411.

1147446144 is a `hidden beast` number, since 1 + 1 + 474 + 46 + 144 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

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

It is a junction number, because it is equal to n+sod(n) for n = 1147446099 and 1147446108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 252339 + ... + 256845.

Almost surely, 2^1147446144 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 1147446144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1882946520).

1147446144 is an abundant number, since it is smaller than the sum of its proper divisors (2618446896).

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

1147446144 is a wasteful number, since it uses less digits than its factorization.

1147446144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4557 (or 4542 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 1147446144 is about 33873.9744346600. The cubic root of 1147446144 is about 1046.9134281449.

The spelling of 1147446144 in words is "one billion, one hundred forty-seven million, four hundred forty-six thousand, one hundred forty-four".