7685428752 has 30 divisors (see below), whose sum is σ = 21508526702. Its totient is φ = 2561809536.

The previous prime is 7685428711. The next prime is 7685428757. The reversal of 7685428752 is 2578245867.

7685428752 is a `hidden beast` number, since 76 + 85 + 428 + 75 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7659050256 + 26378496 = 87516^2 + 5136^2 .

It is not an unprimeable number, because it can be changed into a prime (7685428757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26685373 + ... + 26685660.

Almost surely, 2^7685428752 is an apocalyptic number.

7685428752 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

7685428752 is an abundant number, since it is smaller than the sum of its proper divisors (13823097950).

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

7685428752 is a wasteful number, since it uses less digits than its factorization.

7685428752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53371047 (or 53371038 counting only the distinct ones).

The product of its digits is 7526400, while the sum is 54.

The square root of 7685428752 is about 87666.5771659873. The cubic root of 7685428752 is about 1973.4344268374.

The spelling of 7685428752 in words is "seven billion, six hundred eighty-five million, four hundred twenty-eight thousand, seven hundred fifty-two".