1028705585 has 8 divisors (see below), whose sum is σ = 1238417856. Its totient is φ = 820317040.

The previous prime is 1028705527. The next prime is 1028705593. The reversal of 1028705585 is 5855078201.

1028705585 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1028705585 - 2¹⁴ = 1028689201 is a prime.

It is a super-2 number, since 2×1028705585² = 2116470361220384450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 329219 + ... + 332328.

It is an arithmetic number, because the mean of its divisors is an integer number (154802232).

Almost surely, 2^1028705585 is an apocalyptic number.

It is an amenable number.

1028705585 is a deficient number, since it is larger than the sum of its proper divisors (209712271).

1028705585 is an equidigital number, since it uses as much as digits as its factorization.

1028705585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661863.

The product of its (nonzero) digits is 112000, while the sum is 41.

The square root of 1028705585 is about 32073.4404920956. The cubic root of 1028705585 is about 1009.4784043375.

The spelling of 1028705585 in words is "one billion, twenty-eight million, seven hundred five thousand, five hundred eighty-five".