1165744728 has 24 divisors (see below), whose sum is σ = 3157225500. Its totient is φ = 388581552.

The previous prime is 1165744721. The next prime is 1165744747. The reversal of 1165744728 is 8274475611.

1165744728 is a `hidden beast` number, since 1 + 1 + 6 + 574 + 4 + 72 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165744721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8095378 + ... + 8095521.

Almost surely, 2^1165744728 is an apocalyptic number.

1165744728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1165744728 is an abundant number, since it is smaller than the sum of its proper divisors (1991480772).

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

1165744728 is a wasteful number, since it uses less digits than its factorization.

1165744728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16190911 (or 16190904 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The square root of 1165744728 is about 34143.0040857567. The cubic root of 1165744728 is about 1052.4492267170.

The spelling of 1165744728 in words is "one billion, one hundred sixty-five million, seven hundred forty-four thousand, seven hundred twenty-eight".