1191841984 has 28 divisors (see below), whose sum is σ = 2504184984. Its totient is φ = 560866304.

The previous prime is 1191841979. The next prime is 1191841993. The reversal of 1191841984 is 4891481911.

It is a happy number.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 546634 + ... + 548809.

It is an arithmetic number, because the mean of its divisors is an integer number (89435178).

Almost surely, 2^1191841984 is an apocalyptic number.

It is an amenable number.

1191841984 is an abundant number, since it is smaller than the sum of its proper divisors (1312343000).

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

1191841984 is a wasteful number, since it uses less digits than its factorization.

1191841984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095472 (or 1095462 counting only the distinct ones).

The product of its digits is 82944, while the sum is 46.

The square root of 1191841984 is about 34523.0645221423. The cubic root of 1191841984 is about 1060.2449843154.

The spelling of 1191841984 in words is "one billion, one hundred ninety-one million, eight hundred forty-one thousand, nine hundred eighty-four".