1123213208 has 48 divisors (see below), whose sum is σ = 2319305400. Its totient is φ = 509583360.

The previous prime is 1123213199. The next prime is 1123213213. The reversal of 1123213208 is 8023123211.

It is a happy number.

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 11 ways as a sum of consecutive naturals, for example, 72728 + ... + 86808.

Almost surely, 2^1123213208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1123213208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1159652700).

1123213208 is an abundant number, since it is smaller than the sum of its proper divisors (1196092192).

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

1123213208 is a wasteful number, since it uses less digits than its factorization.

1123213208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14172 (or 14155 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 1123213208 is about 33514.3731554090. The cubic root of 1123213208 is about 1039.4910009252.

Adding to 1123213208 its reverse (8023123211), we get a palindrome (9146336419).

The spelling of 1123213208 in words is "one billion, one hundred twenty-three million, two hundred thirteen thousand, two hundred eight".