1121778408 has 32 divisors (see below), whose sum is σ = 2807762400. Its totient is φ = 373483968.

The previous prime is 1121778407. The next prime is 1121778419. The reversal of 1121778408 is 8048771211.

It is not an unprimeable number, because it can be changed into a prime (1121778401) 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 7 ways as a sum of consecutive naturals, for example, 6591 + ... + 47822.

It is an arithmetic number, because the mean of its divisors is an integer number (87742575).

Almost surely, 2^1121778408 is an apocalyptic number.

It is an amenable number.

1121778408 is an abundant number, since it is smaller than the sum of its proper divisors (1685983992).

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

1121778408 is a wasteful number, since it uses less digits than its factorization.

1121778408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55281 (or 55277 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 39.

The square root of 1121778408 is about 33492.9605738280. The cubic root of 1121778408 is about 1039.0481947580.

The spelling of 1121778408 in words is "one billion, one hundred twenty-one million, seven hundred seventy-eight thousand, four hundred eight".