8428785516 has 36 divisors (see below), whose sum is σ = 21308883232. Its totient is φ = 2809227744.

The previous prime is 8428785503. The next prime is 8428785571. The reversal of 8428785516 is 6155878248.

8428785516 is a `hidden beast` number, since 8 + 4 + 2 + 87 + 8 + 551 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 524781 + ... + 540603.

Almost surely, 2^8428785516 is an apocalyptic number.

It is an amenable number.

8428785516 is an abundant number, since it is smaller than the sum of its proper divisors (12880097716).

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

8428785516 is a wasteful number, since it uses less digits than its factorization.

8428785516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30630 (or 30625 counting only the distinct ones).

The product of its digits is 4300800, while the sum is 54.

The square root of 8428785516 is about 91808.4174572245. The cubic root of 8428785516 is about 2035.1120895625.

The spelling of 8428785516 in words is "eight billion, four hundred twenty-eight million, seven hundred eighty-five thousand, five hundred sixteen".