1128556386 has 24 divisors (see below), whose sum is σ = 2497233024. Its totient is φ = 368181240.

The previous prime is 1128556381. The next prime is 1128556397. The reversal of 1128556386 is 6836558211.

1128556386 is a `hidden beast` number, since 1 + 1 + 2 + 8 + 5 + 5 + 638 + 6 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (1128556381) 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 11 ways as a sum of consecutive naturals, for example, 666150 + ... + 667841.

It is an arithmetic number, because the mean of its divisors is an integer number (104051376).

Almost surely, 2^1128556386 is an apocalyptic number.

1128556386 is an abundant number, since it is smaller than the sum of its proper divisors (1368676638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1128556386 is a wasteful number, since it uses less digits than its factorization.

1128556386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334046 (or 1334043 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The square root of 1128556386 is about 33593.9933023748. The cubic root of 1128556386 is about 1041.1366966359.

The spelling of 1128556386 in words is "one billion, one hundred twenty-eight million, five hundred fifty-six thousand, three hundred eighty-six".