1161385228 has 12 divisors (see below), whose sum is σ = 2075667552. Its totient is φ = 568337360.

The previous prime is 1161385223. The next prime is 1161385261. The reversal of 1161385228 is 8225831611.

It is a super-2 number, since 2×1161385228² = 2697631295633223968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1161385223) 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 3 ways as a sum of consecutive naturals, for example, 3088603 + ... + 3088978.

It is an arithmetic number, because the mean of its divisors is an integer number (172972296).

Almost surely, 2^1161385228 is an apocalyptic number.

It is an amenable number.

1161385228 is a deficient number, since it is larger than the sum of its proper divisors (914282324).

1161385228 is a wasteful number, since it uses less digits than its factorization.

1161385228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6177632 (or 6177630 counting only the distinct ones).

The product of its digits is 23040, while the sum is 37.

The square root of 1161385228 is about 34079.1025116566. The cubic root of 1161385228 is about 1051.1356504834.

The spelling of 1161385228 in words is "one billion, one hundred sixty-one million, three hundred eighty-five thousand, two hundred twenty-eight".