1028700085 has 16 divisors (see below), whose sum is σ = 1448919936. Its totient is φ = 686328768.

The previous prime is 1028700059. The next prime is 1028700097. The reversal of 1028700085 is 5800078201.

It is a cyclic number.

It is not a de Polignac number, because 1028700085 - 2¹¹ = 1028698037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 395887 + ... + 398476.

It is an arithmetic number, because the mean of its divisors is an integer number (90557496).

Almost surely, 2^1028700085 is an apocalyptic number.

It is an amenable number.

1028700085 is a deficient number, since it is larger than the sum of its proper divisors (420219851).

1028700085 is an equidigital number, since it uses as much as digits as its factorization.

1028700085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794412.

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 1028700085 is about 32073.3547512573. The cubic root of 1028700085 is about 1009.4766052671.

Adding to 1028700085 its reverse (5800078201), we get a palindrome (6828778286).

The spelling of 1028700085 in words is "one billion, twenty-eight million, seven hundred thousand, eighty-five".