1123456788 has 36 divisors (see below), whose sum is σ = 2875803840. Its totient is φ = 369744336.

The previous prime is 1123456769. The next prime is 1123456793. The reversal of 1123456788 is 8876543211.

1123456788 is a `hidden beast` number, since 1 + 1 + 2 + 3 + 4 + 567 + 88 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a plaindrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 194670 + ... + 200357.

It is an arithmetic number, because the mean of its divisors is an integer number (79883440).

Almost surely, 2^1123456788 is an apocalyptic number.

1123456788 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1123456788 is an abundant number, since it is smaller than the sum of its proper divisors (1752347052).

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

1123456788 is a wasteful number, since it uses less digits than its factorization.

1123456788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395116 (or 395111 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 1123456788 is about 33518.0069216533. The cubic root of 1123456788 is about 1039.5661368286.

Adding to 1123456788 its reverse (8876543211), we get a palindrome (9999999999).

The spelling of 1123456788 in words is "one billion, one hundred twenty-three million, four hundred fifty-six thousand, seven hundred eighty-eight".