1998019484 has 6 divisors (see below), whose sum is σ = 3496534104. Its totient is φ = 999009740.

The previous prime is 1998019481. The next prime is 1998019511. The reversal of 1998019484 is 4849108991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998019481) by changing a digit.

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 as a sum of consecutive naturals, namely, 249752432 + ... + 249752439.

It is an arithmetic number, because the mean of its divisors is an integer number (582755684).

Almost surely, 2^1998019484 is an apocalyptic number.

It is an amenable number.

1998019484 is a deficient number, since it is larger than the sum of its proper divisors (1498514620).

1998019484 is a wasteful number, since it uses less digits than its factorization.

1998019484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499504875 (or 499504873 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 53.

The square root of 1998019484 is about 44699.2112234657. The cubic root of 1998019484 is about 1259.5050302427.

The spelling of 1998019484 in words is "one billion, nine hundred ninety-eight million, nineteen thousand, four hundred eighty-four".