1123978784 has 12 divisors (see below), whose sum is σ = 2212833294. Its totient is φ = 561989376.

The previous prime is 1123978703. The next prime is 1123978787. The reversal of 1123978784 is 4878793211.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1060935184 + 63043600 = 32572^2 + 7940^2 .

It is not an unprimeable number, because it can be changed into a prime (1123978787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17562137 + ... + 17562200.

Almost surely, 2^1123978784 is an apocalyptic number.

It is an amenable number.

1123978784 is a deficient number, since it is larger than the sum of its proper divisors (1088854510).

1123978784 is an equidigital number, since it uses as much as digits as its factorization.

1123978784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35124347 (or 35124339 counting only the distinct ones).

The product of its digits is 677376, while the sum is 50.

The square root of 1123978784 is about 33525.7928168746. The cubic root of 1123978784 is about 1039.7271177547.

The spelling of 1123978784 in words is "one billion, one hundred twenty-three million, nine hundred seventy-eight thousand, seven hundred eighty-four".