1028530305 has 96 divisors (see below), whose sum is σ = 2067182208. Its totient is φ = 486259200.

The previous prime is 1028530297. The next prime is 1028530313. The reversal of 1028530305 is 5030358201.

It is an interprime number because it is at equal distance from previous prime (1028530297) and next prime (1028530313).

It is not a de Polignac number, because 1028530305 - 2³ = 1028530297 is a prime.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 547027 + ... + 548903.

It is an arithmetic number, because the mean of its divisors is an integer number (21533148).

Almost surely, 2^1028530305 is an apocalyptic number.

1028530305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1028530305 is an abundant number, since it is smaller than the sum of its proper divisors (1038651903).

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

1028530305 is a wasteful number, since it uses less digits than its factorization.

1028530305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1949 (or 1937 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 1028530305 is about 32070.7078967708. The cubic root of 1028530305 is about 1009.4210664467.

Adding to 1028530305 its reverse (5030358201), we get a palindrome (6058888506).

The spelling of 1028530305 in words is "one billion, twenty-eight million, five hundred thirty thousand, three hundred five".