1181228670 has 80 divisors (see below), whose sum is σ = 3343404240. Its totient is φ = 298411776.

The previous prime is 1181228627. The next prime is 1181228701. The reversal of 1181228670 is 768221811.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 22987 + ... + 53766.

It is an arithmetic number, because the mean of its divisors is an integer number (41792553).

Almost surely, 2^1181228670 is an apocalyptic number.

1181228670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1181228670 is an abundant number, since it is smaller than the sum of its proper divisors (2162175570).

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

1181228670 is a wasteful number, since it uses less digits than its factorization.

1181228670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76791 (or 76782 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The square root of 1181228670 is about 34369.0074049281. The cubic root of 1181228670 is about 1057.0884470674.

The spelling of 1181228670 in words is "one billion, one hundred eighty-one million, two hundred twenty-eight thousand, six hundred seventy".