1128647671 has 16 divisors (see below), whose sum is σ = 1216885600. Its totient is φ = 1043601408.

The previous prime is 1128647669. The next prime is 1128647677. The reversal of 1128647671 is 1767468211.

It is a cyclic number.

It is not a de Polignac number, because 1128647671 - 2¹ = 1128647669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128647677) 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, 130345 + ... + 138733.

It is an arithmetic number, because the mean of its divisors is an integer number (76055350).

Almost surely, 2^1128647671 is an apocalyptic number.

1128647671 is a deficient number, since it is larger than the sum of its proper divisors (88237929).

1128647671 is an equidigital number, since it uses as much as digits as its factorization.

1128647671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8578.

The product of its digits is 112896, while the sum is 43.

The square root of 1128647671 is about 33595.3519255268. The cubic root of 1128647671 is about 1041.1647671875.

The spelling of 1128647671 in words is "one billion, one hundred twenty-eight million, six hundred forty-seven thousand, six hundred seventy-one".