1985784968 has 48 divisors (see below), whose sum is σ = 3908356620. Its totient is φ = 945191808.

The previous prime is 1985784967. The next prime is 1985784979. The reversal of 1985784968 is 8694875891.

It can be written as a sum of positive squares in 2 ways, for example, as 1656652804 + 329132164 = 40702^2 + 18142^2 .

It is a super-3 number, since 3×1985784968³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (1985784967) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 652346 + ... + 655382.

Almost surely, 2^1985784968 is an apocalyptic number.

It is an amenable number.

1985784968 is a deficient number, since it is larger than the sum of its proper divisors (1922571652).

1985784968 is a wasteful number, since it uses less digits than its factorization.

1985784968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3174 (or 3123 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 65.

The square root of 1985784968 is about 44562.1472552659. The cubic root of 1985784968 is about 1256.9289802574.

The spelling of 1985784968 in words is "one billion, nine hundred eighty-five million, seven hundred eighty-four thousand, nine hundred sixty-eight".