1128663871 has 8 divisors (see below), whose sum is σ = 1156519760. Its totient is φ = 1100881152.

The previous prime is 1128663869. The next prime is 1128663929. The reversal of 1128663871 is 1783668211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1128663871 - 2¹ = 1128663869 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128663271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13615 + ... + 49423.

It is an arithmetic number, because the mean of its divisors is an integer number (144564970).

Almost surely, 2^1128663871 is an apocalyptic number.

1128663871 is a deficient number, since it is larger than the sum of its proper divisors (27855889).

1128663871 is an equidigital number, since it uses as much as digits as its factorization.

1128663871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36585.

The product of its digits is 96768, while the sum is 43.

The square root of 1128663871 is about 33595.5930294436. The cubic root of 1128663871 is about 1041.1697486029.

It can be divided in two parts, 11286 and 63871, that added together give a palindrome (75157).

The spelling of 1128663871 in words is "one billion, one hundred twenty-eight million, six hundred sixty-three thousand, eight hundred seventy-one".