1998961036 has 12 divisors (see below), whose sum is σ = 3499034112. Its totient is φ = 999237008.

The previous prime is 1998960989. The next prime is 1998961037. The reversal of 1998961036 is 6301698991.

It is not an unprimeable number, because it can be changed into a prime (1998961037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41740 + ... + 75763.

It is an arithmetic number, because the mean of its divisors is an integer number (291586176).

Almost surely, 2^1998961036 is an apocalyptic number.

It is an amenable number.

1998961036 is a deficient number, since it is larger than the sum of its proper divisors (1500073076).

1998961036 is a wasteful number, since it uses less digits than its factorization.

1998961036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121760 (or 121758 counting only the distinct ones).

The product of its (nonzero) digits is 629856, while the sum is 52.

The square root of 1998961036 is about 44709.7420703810. The cubic root of 1998961036 is about 1259.7028433368.

The spelling of 1998961036 in words is "one billion, nine hundred ninety-eight million, nine hundred sixty-one thousand, thirty-six".