1109989558 has 8 divisors (see below), whose sum is σ = 1722397680. Its totient is φ = 535857000.

The previous prime is 1109989541. The next prime is 1109989571. The reversal of 1109989558 is 8559899011.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1109989499 and 1109989508.

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, 9568818 + ... + 9568933.

It is an arithmetic number, because the mean of its divisors is an integer number (215299710).

Almost surely, 2^1109989558 is an apocalyptic number.

1109989558 is a deficient number, since it is larger than the sum of its proper divisors (612408122).

1109989558 is a wasteful number, since it uses less digits than its factorization.

1109989558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19137782.

The product of its (nonzero) digits is 1166400, while the sum is 55.

The square root of 1109989558 is about 33316.5057891730. The cubic root of 1109989558 is about 1035.3955587012.

The spelling of 1109989558 in words is "one billion, one hundred nine million, nine hundred eighty-nine thousand, five hundred fifty-eight".