1028520018 has 20 divisors (see below), whose sum is σ = 2304647070. Its totient is φ = 342839952.

The previous prime is 1028520013. The next prime is 1028520019. The reversal of 1028520018 is 8100258201.

It can be written as a sum of positive squares in only one way, i.e., 1028292489 + 227529 = 32067^2 + 477^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1028519973 and 1028520000.

It is not an unprimeable number, because it can be changed into a prime (1028520013) 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 in 9 ways as a sum of consecutive naturals, for example, 3174283 + ... + 3174606.

Almost surely, 2^1028520018 is an apocalyptic number.

1028520018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1028520018 is an abundant number, since it is smaller than the sum of its proper divisors (1276127052).

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

1028520018 is an equidigital number, since it uses as much as digits as its factorization.

1028520018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6348903 (or 6348894 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 1028520018 is about 32070.5475163740. The cubic root of 1028520018 is about 1009.4177011435.

Adding to 1028520018 its reverse (8100258201), we get a palindrome (9128778219).

It can be divided in two parts, 10285 and 20018, that added together give a palindrome (30303).

The spelling of 1028520018 in words is "one billion, twenty-eight million, five hundred twenty thousand, eighteen".