1998109676 has 12 divisors (see below), whose sum is σ = 3504770472. Its totient is φ = 996746688.

The previous prime is 1998109651. The next prime is 1998109697. The reversal of 1998109676 is 6769018991.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 575090 + ... + 578553.

It is an arithmetic number, because the mean of its divisors is an integer number (292064206).

Almost surely, 2^1998109676 is an apocalyptic number.

It is an amenable number.

1998109676 is a deficient number, since it is larger than the sum of its proper divisors (1506660796).

1998109676 is a wasteful number, since it uses less digits than its factorization.

1998109676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154080 (or 1154078 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 56.

The square root of 1998109676 is about 44700.2200889436. The cubic root of 1998109676 is about 1259.5239816042.

The spelling of 1998109676 in words is "one billion, nine hundred ninety-eight million, one hundred nine thousand, six hundred seventy-six".