1984198860 has 216 divisors, whose sum is σ = 7308319200. Its totient is φ = 426774528.

The previous prime is 1984198849. The next prime is 1984198871. The reversal of 1984198860 is 688914891.

1984198860 is a `hidden beast` number, since 1 + 98 + 419 + 88 + 60 = 666.

It is an interprime number because it is at equal distance from previous prime (1984198849) and next prime (1984198871).

It is a junction number, because it is equal to n+sod(n) for n = 1984198797 and 1984198806.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 361416 + ... + 366864.

Almost surely, 2^1984198860 is an apocalyptic number.

1984198860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1984198860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3654159600).

1984198860 is an abundant number, since it is smaller than the sum of its proper divisors (5324120340).

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

1984198860 is a wasteful number, since it uses less digits than its factorization.

1984198860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5505 (or 5483 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 54.

The square root of 1984198860 is about 44544.3471161044. The cubic root of 1984198860 is about 1256.5942417419.

The spelling of 1984198860 in words is "one billion, nine hundred eighty-four million, one hundred ninety-eight thousand, eight hundred sixty".