1191053688 has 64 divisors (see below), whose sum is σ = 3281886720. Its totient is φ = 357196800.

The previous prime is 1191053687. The next prime is 1191053729. The reversal of 1191053688 is 8863501911.

1191053688 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1191053687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2353 + ... + 48863.

It is an arithmetic number, because the mean of its divisors is an integer number (51279480).

Almost surely, 2^1191053688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1191053688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1640943360).

1191053688 is an abundant number, since it is smaller than the sum of its proper divisors (2090833032).

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

1191053688 is a wasteful number, since it uses less digits than its factorization.

1191053688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46628 (or 46624 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 42.

The square root of 1191053688 is about 34511.6456866374. The cubic root of 1191053688 is about 1060.0111806107.

The spelling of 1191053688 in words is "one billion, one hundred ninety-one million, fifty-three thousand, six hundred eighty-eight".