1193978916 has 81 divisors (see below), whose sum is σ = 3275528529. Its totient is φ = 366548832.

The previous prime is 1193978911. The next prime is 1193978953. The reversal of 1193978916 is 6198793911.

It is a happy number.

The square root of 1193978916 is 34554.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 176624100 + 1017354816 = 13290^2 + 31896^2 .

It is not an unprimeable number, because it can be changed into a prime (1193978911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2694991 + ... + 2695433.

Almost surely, 2^1193978916 is an apocalyptic number.

1193978916 is the 34554-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1193978916

1193978916 is an abundant number, since it is smaller than the sum of its proper divisors (2081549613).

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

1193978916 is a wasteful number, since it uses less digits than its factorization.

1193978916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922 (or 461 counting only the distinct ones).

The product of its digits is 734832, while the sum is 54.

The cubic root of 1193978916 is about 1060.8782670049.

The spelling of 1193978916 in words is "one billion, one hundred ninety-three million, nine hundred seventy-eight thousand, nine hundred sixteen".