6887463840 has 72 divisors (see below), whose sum is σ = 23503475268. Its totient is φ = 1836656640.

The previous prime is 6887463833. The next prime is 6887463851. The reversal of 6887463840 is 483647886.

6887463840 is a `hidden beast` number, since 68 + 87 + 463 + 8 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6633125136 + 254338704 = 81444^2 + 15948^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2390041 + ... + 2392920.

Almost surely, 2^6887463840 is an apocalyptic number.

6887463840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6887463840 is an abundant number, since it is smaller than the sum of its proper divisors (16616011428).

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

6887463840 is a wasteful number, since it uses less digits than its factorization.

6887463840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4782982 (or 4782971 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 54.

The square root of 6887463840 is about 82990.7455081589. The cubic root of 6887463840 is about 1902.6246128294.

The spelling of 6887463840 in words is "six billion, eight hundred eighty-seven million, four hundred sixty-three thousand, eight hundred forty".