1128055779 has 24 divisors (see below), whose sum is σ = 1640051712. Its totient is φ = 747147120.

The previous prime is 1128055711. The next prime is 1128055781. The reversal of 1128055779 is 9775508211.

1128055779 is a `hidden beast` number, since 1 + 1 + 28 + 0 + 557 + 79 = 666.

It is not a de Polignac number, because 1128055779 - 2⁷ = 1128055651 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.

It is not an unprimeable number, because it can be changed into a prime (1128055879) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1306702 + ... + 1307564.

It is an arithmetic number, because the mean of its divisors is an integer number (68335488).

Almost surely, 2^1128055779 is an apocalyptic number.

1128055779 is a deficient number, since it is larger than the sum of its proper divisors (511995933).

1128055779 is a wasteful number, since it uses less digits than its factorization.

1128055779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1647 (or 1644 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 45.

The square root of 1128055779 is about 33586.5416350061. The cubic root of 1128055779 is about 1040.9827307940.

The spelling of 1128055779 in words is "one billion, one hundred twenty-eight million, fifty-five thousand, seven hundred seventy-nine".