1123752778 has 16 divisors (see below), whose sum is σ = 1693125000. Its totient is φ = 559383552.

The previous prime is 1123752737. The next prime is 1123752779. The reversal of 1123752778 is 8772573211.

It can be written as a sum of positive squares in 4 ways, for example, as 1099121409 + 24631369 = 33153^2 + 4963^2 .

It is not an unprimeable number, because it can be changed into a prime (1123752779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 871158 + ... + 872446.

Almost surely, 2^1123752778 is an apocalyptic number.

1123752778 is a deficient number, since it is larger than the sum of its proper divisors (569372222).

1123752778 is a wasteful number, since it uses less digits than its factorization.

1123752778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2889.

The product of its digits is 164640, while the sum is 43.

The square root of 1123752778 is about 33522.4220187026. The cubic root of 1123752778 is about 1039.6574247670.

The spelling of 1123752778 in words is "one billion, one hundred twenty-three million, seven hundred fifty-two thousand, seven hundred seventy-eight".