1998984456 has 48 divisors (see below), whose sum is σ = 6187334400. Its totient is φ = 571138272.

The previous prime is 1998984431. The next prime is 1998984467. The reversal of 1998984456 is 6544898991.

1998984456 is a `hidden beast` number, since 1 + 9 + 98 + 98 + 4 + 456 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 1998984393 and 1998984402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1982616 + ... + 1983623.

It is an arithmetic number, because the mean of its divisors is an integer number (128902800).

Almost surely, 2^1998984456 is an apocalyptic number.

It is an amenable number.

1998984456 is an abundant number, since it is smaller than the sum of its proper divisors (4188349944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1998984456 is a wasteful number, since it uses less digits than its factorization.

1998984456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3966258 (or 3966251 counting only the distinct ones).

The product of its digits is 22394880, while the sum is 63.

The square root of 1998984456 is about 44710.0039812121. The cubic root of 1998984456 is about 1259.7077629133.

The spelling of 1998984456 in words is "one billion, nine hundred ninety-eight million, nine hundred eighty-four thousand, four hundred fifty-six".