1193778916 has 12 divisors (see below), whose sum is σ = 2279032560. Its totient is φ = 542626760.

The previous prime is 1193778899. The next prime is 1193778917. The reversal of 1193778916 is 6198773911.

It is a super-2 number, since 2×1193778916² = 2850216200572270112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1193778917) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 13565626 + ... + 13565713.

It is an arithmetic number, because the mean of its divisors is an integer number (189919380).

Almost surely, 2^1193778916 is an apocalyptic number.

It is an amenable number.

1193778916 is a deficient number, since it is larger than the sum of its proper divisors (1085253644).

1193778916 is a wasteful number, since it uses less digits than its factorization.

1193778916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27131354 (or 27131352 counting only the distinct ones).

The product of its digits is 571536, while the sum is 52.

The square root of 1193778916 is about 34551.1058578448. The cubic root of 1193778916 is about 1060.8190288005.

The spelling of 1193778916 in words is "one billion, one hundred ninety-three million, seven hundred seventy-eight thousand, nine hundred sixteen".