1136665728 has 192 divisors, whose sum is σ = 3756823200. Its totient is φ = 326246400.

The previous prime is 1136665723. The next prime is 1136665729. The reversal of 1136665728 is 8275666311.

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

It is not an unprimeable number, because it can be changed into a prime (1136665723) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 238408 + ... + 243128.

Almost surely, 2^1136665728 is an apocalyptic number.

1136665728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1136665728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1878411600).

1136665728 is an abundant number, since it is smaller than the sum of its proper divisors (2620157472).

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

1136665728 is a wasteful number, since it uses less digits than its factorization.

1136665728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4771 (or 4756 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 1136665728 is about 33714.4735684839. The cubic root of 1136665728 is about 1043.6244740912.

The spelling of 1136665728 in words is "one billion, one hundred thirty-six million, six hundred sixty-five thousand, seven hundred twenty-eight".