1191133804 has 48 divisors (see below), whose sum is σ = 2464773696. Its totient is φ = 493056000.

The previous prime is 1191133799. The next prime is 1191133813. The reversal of 1191133804 is 4083311911.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 110812 + ... + 121084.

It is an arithmetic number, because the mean of its divisors is an integer number (51349452).

Almost surely, 2^1191133804 is an apocalyptic number.

1191133804 is a gapful number since it is divisible by the number (14) 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 1191133804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1232386848).

1191133804 is an abundant number, since it is smaller than the sum of its proper divisors (1273639892).

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

1191133804 is a wasteful number, since it uses less digits than its factorization.

1191133804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10426 (or 10424 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 1191133804 is about 34512.8063767640. The cubic root of 1191133804 is about 1060.0349472280.

The spelling of 1191133804 in words is "one billion, one hundred ninety-one million, one hundred thirty-three thousand, eight hundred four".