9939855284 has 6 divisors (see below), whose sum is σ = 17394746754. Its totient is φ = 4969927640.

The previous prime is 9939855281. The next prime is 9939855323. The reversal of 9939855284 is 4825589399.

It can be written as a sum of positive squares in only one way, i.e., 9864859684 + 74995600 = 99322^2 + 8660^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9939855281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1242481907 + ... + 1242481914.

It is an arithmetic number, because the mean of its divisors is an integer number (2899124459).

Almost surely, 2^9939855284 is an apocalyptic number.

It is an amenable number.

9939855284 is a deficient number, since it is larger than the sum of its proper divisors (7454891470).

9939855284 is a wasteful number, since it uses less digits than its factorization.

9939855284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2484963825 (or 2484963823 counting only the distinct ones).

The product of its digits is 27993600, while the sum is 62.

The square root of 9939855284 is about 99698.8228817171. The cubic root of 9939855284 is about 2150.1067395357.

The spelling of 9939855284 in words is "nine billion, nine hundred thirty-nine million, eight hundred fifty-five thousand, two hundred eighty-four".