1123945888 has 96 divisors (see below), whose sum is σ = 2549304576. Its totient is φ = 483176448.

The previous prime is 1123945883. The next prime is 1123945897. The reversal of 1123945888 is 8885493211.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1123945883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 727645 + ... + 729187.

It is an arithmetic number, because the mean of its divisors is an integer number (26555256).

Almost surely, 2^1123945888 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 1123945888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1274652288).

1123945888 is an abundant number, since it is smaller than the sum of its proper divisors (1425358688).

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

1123945888 is a wasteful number, since it uses less digits than its factorization.

1123945888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1686 (or 1678 counting only the distinct ones).

The product of its digits is 552960, while the sum is 49.

The square root of 1123945888 is about 33525.3022059459. The cubic root of 1123945888 is about 1039.7169742664.

The spelling of 1123945888 in words is "one billion, one hundred twenty-three million, nine hundred forty-five thousand, eight hundred eighty-eight".