1128045385 has 4 divisors (see below), whose sum is σ = 1353654468. Its totient is φ = 902436304.

The previous prime is 1128045383. The next prime is 1128045403. The reversal of 1128045385 is 5835408211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5835408211 = 283 ⋅20619817.

It can be written as a sum of positive squares in 2 ways, for example, as 207590464 + 920454921 = 14408^2 + 30339^2 .

It is a cyclic number.

It is not a de Polignac number, because 1128045385 - 2¹ = 1128045383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1128045383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112804534 + ... + 112804543.

It is an arithmetic number, because the mean of its divisors is an integer number (338413617).

Almost surely, 2^1128045385 is an apocalyptic number.

It is an amenable number.

1128045385 is a deficient number, since it is larger than the sum of its proper divisors (225609083).

1128045385 is an equidigital number, since it uses as much as digits as its factorization.

1128045385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225609082.

The product of its (nonzero) digits is 38400, while the sum is 37.

The square root of 1128045385 is about 33586.3869000522. The cubic root of 1128045385 is about 1040.9795335503.

It can be divided in two parts, 11280 and 45385, that added together give a palindrome (56665).

The spelling of 1128045385 in words is "one billion, one hundred twenty-eight million, forty-five thousand, three hundred eighty-five".