3984451780 has 12 divisors (see below), whose sum is σ = 8367348780. Its totient is φ = 1593780704.

The previous prime is 3984451771. The next prime is 3984451811. The reversal of 3984451780 is 871544893.

It can be written as a sum of positive squares in 2 ways, for example, as 2163552196 + 1820899584 = 46514^2 + 42672^2 .

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 99611275 + ... + 99611314.

It is an arithmetic number, because the mean of its divisors is an integer number (697279065).

Almost surely, 2^3984451780 is an apocalyptic number.

It is an amenable number.

3984451780 is an abundant number, since it is smaller than the sum of its proper divisors (4382897000).

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

3984451780 is a wasteful number, since it uses less digits than its factorization.

3984451780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199222598 (or 199222596 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 49.

The square root of 3984451780 is about 63122.5140500598. The cubic root of 3984451780 is about 1585.3416095381.

The spelling of 3984451780 in words is "three billion, nine hundred eighty-four million, four hundred fifty-one thousand, seven hundred eighty".