1028433289 has 4 divisors (see below), whose sum is σ = 1107543556. Its totient is φ = 949323024.

The previous prime is 1028433281. The next prime is 1028433433. The reversal of 1028433289 is 9823348201.

1028433289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9823348201 = 27983 ⋅351047.

It can be written as a sum of positive squares in 2 ways, for example, as 557196025 + 471237264 = 23605^2 + 21708^2 .

It is not a de Polignac number, because 1028433289 - 2³ = 1028433281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1028433281) 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, 39555114 + ... + 39555139.

It is an arithmetic number, because the mean of its divisors is an integer number (276885889).

Almost surely, 2^1028433289 is an apocalyptic number.

It is an amenable number.

1028433289 is a deficient number, since it is larger than the sum of its proper divisors (79110267).

1028433289 is an equidigital number, since it uses as much as digits as its factorization.

1028433289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79110266.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 1028433289 is about 32069.1953282274. The cubic root of 1028433289 is about 1009.3893276077.

The spelling of 1028433289 in words is "one billion, twenty-eight million, four hundred thirty-three thousand, two hundred eighty-nine".