1028005115 has 4 divisors (see below), whose sum is σ = 1233606144. Its totient is φ = 822404088.

The previous prime is 1028005093. The next prime is 1028005133. The reversal of 1028005115 is 5115008201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5115008201 = 52313 ⋅97777.

It is a cyclic number.

It is not a de Polignac number, because 1028005115 - 2¹⁰ = 1028004091 is a prime.

It is a Duffinian number.

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, 102800507 + ... + 102800516.

It is an arithmetic number, because the mean of its divisors is an integer number (308401536).

Almost surely, 2^1028005115 is an apocalyptic number.

1028005115 is a deficient number, since it is larger than the sum of its proper divisors (205601029).

1028005115 is an equidigital number, since it uses as much as digits as its factorization.

1028005115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205601028.

The product of its (nonzero) digits is 400, while the sum is 23.

The square root of 1028005115 is about 32062.5188498970. The cubic root of 1028005115 is about 1009.2492263929.

The spelling of 1028005115 in words is "one billion, twenty-eight million, five thousand, one hundred fifteen".