1028330440 has 16 divisors (see below), whose sum is σ = 2313743580. Its totient is φ = 411332160.

The previous prime is 1028330399. The next prime is 1028330453. The reversal of 1028330440 is 440338201.

1028330440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 968329924 + 60000516 = 31118^2 + 7746^2 .

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, 12854091 + ... + 12854170.

Almost surely, 2^1028330440 is an apocalyptic number.

1028330440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1028330440 is an abundant number, since it is smaller than the sum of its proper divisors (1285413140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1028330440 is a wasteful number, since it uses less digits than its factorization.

1028330440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25708272 (or 25708268 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 1028330440 is about 32067.5917399483. The cubic root of 1028330440 is about 1009.3556783197.

Adding to 1028330440 its reverse (440338201), we get a palindrome (1468668641).

The spelling of 1028330440 in words is "one billion, twenty-eight million, three hundred thirty thousand, four hundred forty".