1109143888 has 20 divisors (see below), whose sum is σ = 2168684980. Its totient is φ = 549483264.

The previous prime is 1109143873. The next prime is 1109143901. The reversal of 1109143888 is 8883419011.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 910108224 + 199035664 = 30168^2 + 14108^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316245 + ... + 319732.

It is an arithmetic number, because the mean of its divisors is an integer number (108434249).

Almost surely, 2^1109143888 is an apocalyptic number.

It is an amenable number.

1109143888 is a deficient number, since it is larger than the sum of its proper divisors (1059541092).

1109143888 is a wasteful number, since it uses less digits than its factorization.

1109143888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636094 (or 636088 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 43.

The square root of 1109143888 is about 33303.8119139536. The cubic root of 1109143888 is about 1035.1325455897.

The spelling of 1109143888 in words is "one billion, one hundred nine million, one hundred forty-three thousand, eight hundred eighty-eight".