1123786220 has 24 divisors (see below), whose sum is σ = 2417512608. Its totient is φ = 438550400.

The previous prime is 1123786199. The next prime is 1123786229. The reversal of 1123786220 is 226873211.

It is not an unprimeable number, because it can be changed into a prime (1123786229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 684416 + ... + 686055.

It is an arithmetic number, because the mean of its divisors is an integer number (100729692).

Almost surely, 2^1123786220 is an apocalyptic number.

1123786220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123786220 is an abundant number, since it is smaller than the sum of its proper divisors (1293726388).

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

1123786220 is a wasteful number, since it uses less digits than its factorization.

1123786220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1370521 (or 1370519 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 1123786220 is about 33522.9208154659. The cubic root of 1123786220 is about 1039.6677377941.

The spelling of 1123786220 in words is "one billion, one hundred twenty-three million, seven hundred eighty-six thousand, two hundred twenty".