1099985798 has 8 divisors (see below), whose sum is σ = 1650151008. Its totient is φ = 549935464.

The previous prime is 1099985773. The next prime is 1099985819. The reversal of 1099985798 is 8975899901.

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

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, 1640 + ... + 46932.

It is an arithmetic number, because the mean of its divisors is an integer number (206268876).

Almost surely, 2^1099985798 is an apocalyptic number.

1099985798 is a deficient number, since it is larger than the sum of its proper divisors (550165210).

1099985798 is a wasteful number, since it uses less digits than its factorization.

1099985798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57438.

The product of its (nonzero) digits is 14696640, while the sum is 65.

The square root of 1099985798 is about 33166.0337996571. The cubic root of 1099985798 is about 1032.2756728790.

The spelling of 1099985798 in words is "one billion, ninety-nine million, nine hundred eighty-five thousand, seven hundred ninety-eight".