1189946772 has 108 divisors (see below), whose sum is σ = 3584569716. Its totient is φ = 331672320.

The previous prime is 1189946761. The next prime is 1189946809. The reversal of 1189946772 is 2776499811.

It can be written as a sum of positive squares in 2 ways, for example, as 559133316 + 630813456 = 23646^2 + 25116^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 64098 + ... + 80550.

Almost surely, 2^1189946772 is an apocalyptic number.

1189946772 is a gapful number since it is divisible by the number (12) 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 1189946772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1792284858).

1189946772 is an abundant number, since it is smaller than the sum of its proper divisors (2394622944).

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

1189946772 is a wasteful number, since it uses less digits than its factorization.

1189946772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16518 (or 16506 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 54.

The square root of 1189946772 is about 34495.6051113761. The cubic root of 1189946772 is about 1059.6827019924.

The spelling of 1189946772 in words is "one billion, one hundred eighty-nine million, nine hundred forty-six thousand, seven hundred seventy-two".