1171831680 has 192 divisors, whose sum is σ = 4079995920. Its totient is φ = 309903360.

The previous prime is 1171831621. The next prime is 1171831691. The reversal of 1171831680 is 861381711.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 753784 + ... + 755336.

Almost surely, 2^1171831680 is an apocalyptic number.

1171831680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1171831680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2039997960).

1171831680 is an abundant number, since it is smaller than the sum of its proper divisors (2908164240).

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

1171831680 is a wasteful number, since it uses less digits than its factorization.

1171831680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709 (or 1694 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 1171831680 is about 34232.0271091269. The cubic root of 1171831680 is about 1054.2778403549.

The spelling of 1171831680 in words is "one billion, one hundred seventy-one million, eight hundred thirty-one thousand, six hundred eighty".