1121443988 has 24 divisors (see below), whose sum is σ = 2288664000. Its totient is φ = 480618264.

The previous prime is 1121443957. The next prime is 1121443991. The reversal of 1121443988 is 8893441211.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 407318 + ... + 410061.

It is an arithmetic number, because the mean of its divisors is an integer number (95361000).

Almost surely, 2^1121443988 is an apocalyptic number.

It is an amenable number.

1121443988 is an abundant number, since it is smaller than the sum of its proper divisors (1167220012).

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

1121443988 is an equidigital number, since it uses as much as digits as its factorization.

1121443988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817404 (or 817388 counting only the distinct ones).

The product of its digits is 55296, while the sum is 41.

The square root of 1121443988 is about 33487.9678093491. The cubic root of 1121443988 is about 1038.9449322270.

The spelling of 1121443988 in words is "one billion, one hundred twenty-one million, four hundred forty-three thousand, nine hundred eighty-eight".