1066247728 has 80 divisors (see below), whose sum is σ = 2624720896. Its totient is φ = 408188160.

The previous prime is 1066247723. The next prime is 1066247747. The reversal of 1066247728 is 8277426601.

It is a super-2 number, since 2×1066247728² = 2273768434930323968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1066247723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33325 + ... + 56947.

Almost surely, 2^1066247728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1066247728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1312360448).

1066247728 is an abundant number, since it is smaller than the sum of its proper divisors (1558473168).

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

1066247728 is a wasteful number, since it uses less digits than its factorization.

1066247728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23682 (or 23676 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 43.

The square root of 1066247728 is about 32653.4489449430. The cubic root of 1066247728 is about 1021.6121270703.

The spelling of 1066247728 in words is "one billion, sixty-six million, two hundred forty-seven thousand, seven hundred twenty-eight".