1028435697 has 20 divisors (see below), whose sum is σ = 1546634100. Its totient is φ = 681014304.

The previous prime is 1028435669. The next prime is 1028435741. The reversal of 1028435697 is 7965348201.

1028435697 is a `hidden beast` number, since 1 + 0 + 2 + 84 + 3 + 569 + 7 = 666.

1028435697 is digitally balanced in base 10, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 275427216 + 753008481 = 16596^2 + 27441^2 .

It is not a de Polignac number, because 1028435697 - 2¹⁵ = 1028402929 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

1028435697 is strictly pandigital in base 10.

It is not an unprimeable number, because it can be changed into a prime (1028435627) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 30538 + ... + 54675.

It is an arithmetic number, because the mean of its divisors is an integer number (77331705).

It is a 2-persistent number, because it is pandigital, and so is 2⋅1028435697 = 2056871394, but 3⋅1028435697 = 3085307091 is not.

Almost surely, 2^1028435697 is an apocalyptic number.

It is an amenable number.

1028435697 is a deficient number, since it is larger than the sum of its proper divisors (518198403).

1028435697 is an equidigital number, since it uses as much as digits as its factorization.

1028435697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85374 (or 85365 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 1028435697 is about 32069.2328720224. The cubic root of 1028435697 is about 1009.3901154104.

The spelling of 1028435697 in words is "one billion, twenty-eight million, four hundred thirty-five thousand, six hundred ninety-seven".