1108993988 has 12 divisors (see below), whose sum is σ = 2007661740. Its totient is φ = 535376352.

The previous prime is 1108993987. The next prime is 1108994063. The reversal of 1108993988 is 8893998011.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 862127044 + 246866944 = 29362^2 + 15712^2 .

It is not an unprimeable number, because it can be changed into a prime (1108993987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4780031 + ... + 4780262.

It is an arithmetic number, because the mean of its divisors is an integer number (167305145).

Almost surely, 2^1108993988 is an apocalyptic number.

It is an amenable number.

1108993988 is a deficient number, since it is larger than the sum of its proper divisors (898667752).

1108993988 is a wasteful number, since it uses less digits than its factorization.

1108993988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9560326 (or 9560324 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 56.

The square root of 1108993988 is about 33301.5613447778. The cubic root of 1108993988 is about 1035.0859110154.

The spelling of 1108993988 in words is "one billion, one hundred eight million, nine hundred ninety-three thousand, nine hundred eighty-eight".