1161856228 has 24 divisors (see below), whose sum is σ = 2318456952. Its totient is φ = 504697344.

The previous prime is 1161856187. The next prime is 1161856229. The reversal of 1161856228 is 8226581611.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 124500964 + 1037355264 = 11158^2 + 32208^2 .

It is not an unprimeable number, because it can be changed into a prime (1161856229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 656275 + ... + 658042.

It is an arithmetic number, because the mean of its divisors is an integer number (96602373).

Almost surely, 2^1161856228 is an apocalyptic number.

It is an amenable number.

1161856228 is a deficient number, since it is larger than the sum of its proper divisors (1156600724).

1161856228 is a wasteful number, since it uses less digits than its factorization.

1161856228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1314351 (or 1314349 counting only the distinct ones).

The product of its digits is 46080, while the sum is 40.

The square root of 1161856228 is about 34086.0122044219. The cubic root of 1161856228 is about 1051.2777273664.

It can be divided in two parts, 1161856 and 228, that added together give a square (1162084 = 1078²).

The spelling of 1161856228 in words is "one billion, one hundred sixty-one million, eight hundred fifty-six thousand, two hundred twenty-eight".