1066728328 has 8 divisors (see below), whose sum is σ = 2000115630. Its totient is φ = 533364160.

The previous prime is 1066728317. The next prime is 1066728349. The reversal of 1066728328 is 8238276601.

It can be written as a sum of positive squares in only one way, i.e., 807582724 + 259145604 = 28418^2 + 16098^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1066728328² = 2275818651515351168, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66670513 + ... + 66670528.

Almost surely, 2^1066728328 is an apocalyptic number.

It is an amenable number.

1066728328 is a deficient number, since it is larger than the sum of its proper divisors (933387302).

1066728328 is a wasteful number, since it uses less digits than its factorization.

1066728328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133341047 (or 133341043 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 1066728328 is about 32660.8072159890. The cubic root of 1066728328 is about 1021.7655976709.

The spelling of 1066728328 in words is "one billion, sixty-six million, seven hundred twenty-eight thousand, three hundred twenty-eight".