1171871780 has 24 divisors (see below), whose sum is σ = 2492085120. Its totient is φ = 462814560.

The previous prime is 1171871777. The next prime is 1171871783. The reversal of 1171871780 is 871781711.

It is an interprime number because it is at equal distance from previous prime (1171871777) and next prime (1171871783).

It is not an unprimeable number, because it can be changed into a prime (1171871783) 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 7 ways as a sum of consecutive naturals, for example, 369266 + ... + 372425.

It is an arithmetic number, because the mean of its divisors is an integer number (103836880).

Almost surely, 2^1171871780 is an apocalyptic number.

1171871780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1171871780 is an abundant number, since it is smaller than the sum of its proper divisors (1320213340).

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

1171871780 is a wasteful number, since it uses less digits than its factorization.

1171871780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741779 (or 741777 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 41.

The square root of 1171871780 is about 34232.6128129303. The cubic root of 1171871780 is about 1054.2898659896.

The spelling of 1171871780 in words is "one billion, one hundred seventy-one million, eight hundred seventy-one thousand, seven hundred eighty".