1144788534 has 72 divisors (see below), whose sum is σ = 2646511920. Its totient is φ = 357564672.

The previous prime is 1144788529. The next prime is 1144788559. The reversal of 1144788534 is 4358874411.

1144788534 is a `hidden beast` number, since 1 + 1 + 44 + 78 + 8 + 534 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1144788534.

It is a congruent number.

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 35 ways as a sum of consecutive naturals, for example, 1867212 + ... + 1867824.

It is an arithmetic number, because the mean of its divisors is an integer number (36757110).

Almost surely, 2^1144788534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1144788534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1323255960).

1144788534 is an abundant number, since it is smaller than the sum of its proper divisors (1501723386).

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

1144788534 is a wasteful number, since it uses less digits than its factorization.

1144788534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014 (or 994 counting only the distinct ones).

The product of its digits is 430080, while the sum is 45.

The square root of 1144788534 is about 33834.7237908040. The cubic root of 1144788534 is about 1046.1045482379.

The spelling of 1144788534 in words is "one billion, one hundred forty-four million, seven hundred eighty-eight thousand, five hundred thirty-four".