1191698160 has 160 divisors (see below), whose sum is σ = 3904035840. Its totient is φ = 300217344.

The previous prime is 1191698141. The next prime is 1191698161. The reversal of 1191698160 is 618961911.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1191698161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 325299 + ... + 328941.

It is an arithmetic number, because the mean of its divisors is an integer number (24400224).

Almost surely, 2^1191698160 is an apocalyptic number.

1191698160 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 1191698160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1952017920).

1191698160 is an abundant number, since it is smaller than the sum of its proper divisors (2712337680).

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

1191698160 is a wasteful number, since it uses less digits than its factorization.

1191698160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3735 (or 3729 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 42.

The square root of 1191698160 is about 34520.9814460713. The cubic root of 1191698160 is about 1060.2023346994.

The spelling of 1191698160 in words is "one billion, one hundred ninety-one million, six hundred ninety-eight thousand, one hundred sixty".