1123191916 has 96 divisors (see below), whose sum is σ = 2632896000. Its totient is φ = 414469440.

The previous prime is 1123191889. The next prime is 1123191919. The reversal of 1123191916 is 6191913211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123191919) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 284790 + ... + 288706.

It is an arithmetic number, because the mean of its divisors is an integer number (27426000).

Almost surely, 2^1123191916 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 1123191916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1316448000).

1123191916 is an abundant number, since it is smaller than the sum of its proper divisors (1509704084).

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

1123191916 is a wasteful number, since it uses less digits than its factorization.

1123191916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3972 (or 3956 counting only the distinct ones).

The product of its digits is 2916, while the sum is 34.

The square root of 1123191916 is about 33514.0554991484. The cubic root of 1123191916 is about 1039.4844325723.

The spelling of 1123191916 in words is "one billion, one hundred twenty-three million, one hundred ninety-one thousand, nine hundred sixteen".