1028775 has 48 divisors (see below), whose sum is σ = 1964160. Its totient is φ = 470400.

The previous prime is 1028773. The next prime is 1028777. The reversal of 1028775 is 5778201.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1028773) and next prime (1028777).

It is not a de Polignac number, because 1028775 - 2¹ = 1028773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23904 + ... + 23946.

It is an arithmetic number, because the mean of its divisors is an integer number (40920).

2^1028775 is an apocalyptic number.

1028775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1028775 is a deficient number, since it is larger than the sum of its proper divisors (935385).

1028775 is a wasteful number, since it uses less digits than its factorization.

1028775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96 (or 91 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 30.

The square root of 1028775 is about 1014.2854627766. The cubic root of 1028775 is about 100.9501109690.

The spelling of 1028775 in words is "one million, twenty-eight thousand, seven hundred seventy-five".