1165973728 has 24 divisors (see below), whose sum is σ = 2298351888. Its totient is φ = 582265344.

The previous prime is 1165973717. The next prime is 1165973729. The reversal of 1165973728 is 8273795611.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165973729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4200 + ... + 48472.

It is an arithmetic number, because the mean of its divisors is an integer number (95764662).

Almost surely, 2^1165973728 is an apocalyptic number.

It is an amenable number.

1165973728 is a deficient number, since it is larger than the sum of its proper divisors (1132378160).

1165973728 is an equidigital number, since it uses as much as digits as its factorization.

1165973728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45106 (or 45098 counting only the distinct ones).

The product of its digits is 635040, while the sum is 49.

The square root of 1165973728 is about 34146.3574631321. The cubic root of 1165973728 is about 1052.5181369130.

The spelling of 1165973728 in words is "one billion, one hundred sixty-five million, nine hundred seventy-three thousand, seven hundred twenty-eight".