1128116287 has 4 divisors (see below), whose sum is σ = 1142396320. Its totient is φ = 1113836256.

The previous prime is 1128116267. The next prime is 1128116291. The reversal of 1128116287 is 7826118211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1128116287 - 2¹⁹ = 1127591999 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 (1128116267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7139898 + ... + 7140055.

It is an arithmetic number, because the mean of its divisors is an integer number (285599080).

Almost surely, 2^1128116287 is an apocalyptic number.

1128116287 is a deficient number, since it is larger than the sum of its proper divisors (14280033).

1128116287 is an equidigital number, since it uses as much as digits as its factorization.

1128116287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14280032.

The product of its digits is 10752, while the sum is 37.

The square root of 1128116287 is about 33587.4424003972. The cubic root of 1128116287 is about 1041.0013429519.

The spelling of 1128116287 in words is "one billion, one hundred twenty-eight million, one hundred sixteen thousand, two hundred eighty-seven".