1028440529 has 4 divisors (see below), whose sum is σ = 1031387700. Its totient is φ = 1025493360.

The previous prime is 1028440507. The next prime is 1028440537. The reversal of 1028440529 is 9250448201.

1028440529 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: 9250448201 = 7507 ⋅1232243.

It can be written as a sum of positive squares in 2 ways, for example, as 922762129 + 105678400 = 30377^2 + 10280^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1028440529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1028440549) 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, 1473062 + ... + 1473759.

It is an arithmetic number, because the mean of its divisors is an integer number (257846925).

Almost surely, 2^1028440529 is an apocalyptic number.

It is an amenable number.

1028440529 is a deficient number, since it is larger than the sum of its proper divisors (2947171).

1028440529 is an equidigital number, since it uses as much as digits as its factorization.

1028440529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2947170.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 1028440529 is about 32069.3082089402. The cubic root of 1028440529 is about 1009.3916962467.

The spelling of 1028440529 in words is "one billion, twenty-eight million, four hundred forty thousand, five hundred twenty-nine".