1123457780 has 12 divisors (see below), whose sum is σ = 2359261380. Its totient is φ = 449383104.

The previous prime is 1123457773. The next prime is 1123457791. The reversal of 1123457780 is 877543211.

It can be written as a sum of positive squares in 2 ways, for example, as 311663716 + 811794064 = 17654^2 + 28492^2 .

It is a congruent number.

It is an unprimeable number.

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, 28086425 + ... + 28086464.

It is an arithmetic number, because the mean of its divisors is an integer number (196605115).

Almost surely, 2^1123457780 is an apocalyptic number.

1123457780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123457780 is an abundant number, since it is smaller than the sum of its proper divisors (1235803600).

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

1123457780 is a wasteful number, since it uses less digits than its factorization.

1123457780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56172898 (or 56172896 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 1123457780 is about 33518.0217196660. The cubic root of 1123457780 is about 1039.5664428037.

The spelling of 1123457780 in words is "one billion, one hundred twenty-three million, four hundred fifty-seven thousand, seven hundred eighty".