4781909988 has 18 divisors (see below), whose sum is σ = 12087605894. Its totient is φ = 1593969984.

The previous prime is 4781909981. The next prime is 4781910011. The reversal of 4781909988 is 8899091874.

It can be written as a sum of positive squares in only one way, i.e., 4561921764 + 219988224 = 67542^2 + 14832^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (4781909981) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66415381 + ... + 66415452.

Almost surely, 2^4781909988 is an apocalyptic number.

It is an amenable number.

4781909988 is an abundant number, since it is smaller than the sum of its proper divisors (7305695906).

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

4781909988 is a wasteful number, since it uses less digits than its factorization.

4781909988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132830843 (or 132830838 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 63.

The square root of 4781909988 is about 69151.3556483168. The cubic root of 4781909988 is about 1684.7435368845.

The spelling of 4781909988 in words is "four billion, seven hundred eighty-one million, nine hundred nine thousand, nine hundred eighty-eight".