1128283889 has 4 divisors (see below), whose sum is σ = 1167190260. Its totient is φ = 1089377520.

The previous prime is 1128283873. The next prime is 1128283901. The reversal of 1128283889 is 9883828211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9883828211 = 73 ⋅135394907.

It can be written as a sum of positive squares in 2 ways, for example, as 619014400 + 509269489 = 24880^2 + 22567^2 .

It is a cyclic number.

It is not a de Polignac number, because 1128283889 - 2⁴ = 1128283873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1128283589) 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, 19453142 + ... + 19453199.

It is an arithmetic number, because the mean of its divisors is an integer number (291797565).

Almost surely, 2^1128283889 is an apocalyptic number.

It is an amenable number.

1128283889 is a deficient number, since it is larger than the sum of its proper divisors (38906371).

1128283889 is an equidigital number, since it uses as much as digits as its factorization.

1128283889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38906370.

The product of its digits is 442368, while the sum is 50.

The square root of 1128283889 is about 33589.9373175956. The cubic root of 1128283889 is about 1041.0528935676.

The spelling of 1128283889 in words is "one billion, one hundred twenty-eight million, two hundred eighty-three thousand, eight hundred eighty-nine".