1123457778 has 12 divisors (see below), whose sum is σ = 2434158558. Its totient is φ = 374485920.

The previous prime is 1123457773. The next prime is 1123457791. The reversal of 1123457778 is 8777543211.

1123457778 is a `hidden beast` number, since 1 + 1 + 2 + 3 + 4 + 577 + 78 = 666.

It can be written as a sum of positive squares in only one way, i.e., 917908209 + 205549569 = 30297^2 + 14337^2 .

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1123457773) 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 5 ways as a sum of consecutive naturals, for example, 31207143 + ... + 31207178.

Almost surely, 2^1123457778 is an apocalyptic number.

1123457778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1123457778 is an abundant number, since it is smaller than the sum of its proper divisors (1310700780).

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

1123457778 is a wasteful number, since it uses less digits than its factorization.

1123457778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62414329 (or 62414326 counting only the distinct ones).

The product of its digits is 329280, while the sum is 45.

The square root of 1123457778 is about 33518.0216898313. The cubic root of 1123457778 is about 1039.5664421868.

The spelling of 1123457778 in words is "one billion, one hundred twenty-three million, four hundred fifty-seven thousand, seven hundred seventy-eight".