7828788684 has 48 divisors (see below), whose sum is σ = 18666805248. Its totient is φ = 2552571648.

The previous prime is 7828788683. The next prime is 7828788697. The reversal of 7828788684 is 4868878287.

It is a super-2 number, since 2×7828788684² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7828788683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1360317 + ... + 1366059.

It is an arithmetic number, because the mean of its divisors is an integer number (388891776).

Almost surely, 2^7828788684 is an apocalyptic number.

It is an amenable number.

7828788684 is an abundant number, since it is smaller than the sum of its proper divisors (10838016564).

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

7828788684 is a wasteful number, since it uses less digits than its factorization.

7828788684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8214 (or 8212 counting only the distinct ones).

The product of its digits is 77070336, while the sum is 66.

The square root of 7828788684 is about 88480.4423813534. The cubic root of 7828788684 is about 1985.6293802899.

The spelling of 7828788684 in words is "seven billion, eight hundred twenty-eight million, seven hundred eighty-eight thousand, six hundred eighty-four".