1028440507 has 2 divisors, whose sum is σ = 1028440508. Its totient is φ = 1028440506.

The previous prime is 1028440499. The next prime is 1028440537. The reversal of 1028440507 is 7050448201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1028440507 - 2³ = 1028440499 is a prime.

It is a super-3 number, since 3×1028440507³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1028440537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 514220253 + 514220254.

It is an arithmetic number, because the mean of its divisors is an integer number (514220254).

Almost surely, 2^1028440507 is an apocalyptic number.

1028440507 is a deficient number, since it is larger than the sum of its proper divisors (1).

1028440507 is an equidigital number, since it uses as much as digits as its factorization.

1028440507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 1028440507 is about 32069.3078659331. The cubic root of 1028440507 is about 1009.3916890492.

Adding to 1028440507 its reverse (7050448201), we get a palindrome (8078888708).

The spelling of 1028440507 in words is "one billion, twenty-eight million, four hundred forty thousand, five hundred seven".