6878387520 has 84 divisors (see below), whose sum is σ = 23658796980. Its totient is φ = 1834235904.

The previous prime is 6878387489. The next prime is 6878387569. The reversal of 6878387520 is 257838786.

6878387520 is a `hidden beast` number, since 6 + 87 + 8 + 38 + 7 + 520 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3159339264 + 3719048256 = 56208^2 + 60984^2 .

It is a congruent number.

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, 1191285 + ... + 1197044.

It is an arithmetic number, because the mean of its divisors is an integer number (281652345).

Almost surely, 2^6878387520 is an apocalyptic number.

6878387520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6878387520 is an abundant number, since it is smaller than the sum of its proper divisors (16780409460).

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

6878387520 is a wasteful number, since it uses less digits than its factorization.

6878387520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2388352 (or 2388339 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 54.

The square root of 6878387520 is about 82936.0447573912. The cubic root of 6878387520 is about 1901.7884840103.

The spelling of 6878387520 in words is "six billion, eight hundred seventy-eight million, three hundred eighty-seven thousand, five hundred twenty".