1100019988 has 24 divisors (see below), whose sum is σ = 2010258432. Its totient is φ = 525696864.

The previous prime is 1100019961. The next prime is 1100020021. The reversal of 1100019988 is 8899100011.

It is a happy number.

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, 143181 + ... + 150667.

It is an arithmetic number, because the mean of its divisors is an integer number (83760768).

Almost surely, 2^1100019988 is an apocalyptic number.

It is an amenable number.

1100019988 is a deficient number, since it is larger than the sum of its proper divisors (910238444).

1100019988 is a wasteful number, since it uses less digits than its factorization.

1100019988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9111 (or 9109 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 37.

The square root of 1100019988 is about 33166.5492326229. The cubic root of 1100019988 is about 1032.2863679079.

Adding to 1100019988 its reverse (8899100011), we get a palindrome (9999119999).

The spelling of 1100019988 in words is "one billion, one hundred million, nineteen thousand, nine hundred eighty-eight".