1191088660 has 24 divisors (see below), whose sum is σ = 2503226880. Its totient is φ = 476065824.

The previous prime is 1191088651. The next prime is 1191088669. The reversal of 1191088660 is 668801911.

It is an interprime number because it is at equal distance from previous prime (1191088651) and next prime (1191088669).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1191088669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4101 + ... + 48979.

It is an arithmetic number, because the mean of its divisors is an integer number (104301120).

Almost surely, 2^1191088660 is an apocalyptic number.

1191088660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1191088660 is an abundant number, since it is smaller than the sum of its proper divisors (1312138220).

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

1191088660 is a wasteful number, since it uses less digits than its factorization.

1191088660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46215 (or 46213 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 1191088660 is about 34512.1523524685. The cubic root of 1191088660 is about 1060.0215552754.

The spelling of 1191088660 in words is "one billion, one hundred ninety-one million, eighty-eight thousand, six hundred sixty".