1191108860 has 24 divisors (see below), whose sum is σ = 2632978320. Its totient is φ = 451367424.

The previous prime is 1191108823. The next prime is 1191108869. The reversal of 1191108860 is 688011911.

It is a self number, because there is not a number n which added to its sum of digits gives 1191108860.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1191108869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1566869 + ... + 1567628.

It is an arithmetic number, because the mean of its divisors is an integer number (109707430).

Almost surely, 2^1191108860 is an apocalyptic number.

1191108860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1191108860 is an abundant number, since it is smaller than the sum of its proper divisors (1441869460).

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

1191108860 is a wasteful number, since it uses less digits than its factorization.

1191108860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3134525 (or 3134523 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 35.

The square root of 1191108860 is about 34512.4450017671. The cubic root of 1191108860 is about 1060.0275476405.

The spelling of 1191108860 in words is "one billion, one hundred ninety-one million, one hundred eight thousand, eight hundred sixty".