1028256875 has 10 divisors (see below), whose sum is σ = 1284910572. Its totient is φ = 822605000.

The previous prime is 1028256833. The next prime is 1028256907. The reversal of 1028256875 is 5786528201.

It is not a de Polignac number, because 1028256875 - 2¹² = 1028252779 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 821981 + ... + 823230.

Almost surely, 2^1028256875 is an apocalyptic number.

1028256875 is a deficient number, since it is larger than the sum of its proper divisors (256653697).

1028256875 is an frugal number, since it uses more digits than its factorization.

1028256875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1645231 (or 1645216 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 44.

The square root of 1028256875 is about 32066.4446891139. Note that the first 3 decimals coincide. The cubic root of 1028256875 is about 1009.3316085530.

The spelling of 1028256875 in words is "one billion, twenty-eight million, two hundred fifty-six thousand, eight hundred seventy-five".