1128639275 has 12 divisors (see below), whose sum is σ = 1432060872. Its totient is φ = 881912640.

The previous prime is 1128639257. The next prime is 1128639283. The reversal of 1128639275 is 5729368211.

It is not a de Polignac number, because 1128639275 - 2²⁰ = 1127590699 is a prime.

It is a super-2 number, since 2×1128639275² = 2547653226145051250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 523874 + ... + 526023.

It is an arithmetic number, because the mean of its divisors is an integer number (119338406).

Almost surely, 2^1128639275 is an apocalyptic number.

1128639275 is a deficient number, since it is larger than the sum of its proper divisors (303421597).

1128639275 is a wasteful number, since it uses less digits than its factorization.

1128639275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049950 (or 1049945 counting only the distinct ones).

The product of its digits is 181440, while the sum is 44.

The square root of 1128639275 is about 33595.2269675322. The cubic root of 1128639275 is about 1041.1621854426.

The spelling of 1128639275 in words is "one billion, one hundred twenty-eight million, six hundred thirty-nine thousand, two hundred seventy-five".