1128166085 has 4 divisors (see below), whose sum is σ = 1353799308. Its totient is φ = 902532864.

The previous prime is 1128166079. The next prime is 1128166099. The reversal of 1128166085 is 5806618211.

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

It can be written as a sum of positive squares in 2 ways, for example, as 418529764 + 709636321 = 20458^2 + 26639^2 .

It is a cyclic number.

It is not a de Polignac number, because 1128166085 - 2¹² = 1128161989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112816604 + ... + 112816613.

It is an arithmetic number, because the mean of its divisors is an integer number (338449827).

Almost surely, 2^1128166085 is an apocalyptic number.

It is an amenable number.

1128166085 is a deficient number, since it is larger than the sum of its proper divisors (225633223).

1128166085 is an equidigital number, since it uses as much as digits as its factorization.

1128166085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225633222.

The product of its (nonzero) digits is 23040, while the sum is 38.

The square root of 1128166085 is about 33588.1837109422. The cubic root of 1128166085 is about 1041.0166602328.

The spelling of 1128166085 in words is "one billion, one hundred twenty-eight million, one hundred sixty-six thousand, eighty-five".