6488840 has 16 divisors (see below), whose sum is σ = 14599980. Its totient is φ = 2595520.

The previous prime is 6488831. The next prime is 6488851. The reversal of 6488840 is 488846.

It can be written as a sum of positive squares in 2 ways, for example, as 6482116 + 6724 = 2546^2 + 82^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6488794 and 6488803.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81071 + ... + 81150.

Almost surely, 2^6488840 is an apocalyptic number.

It is an amenable number.

6488840 is an abundant number, since it is smaller than the sum of its proper divisors (8111140).

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

6488840 is a wasteful number, since it uses less digits than its factorization.

6488840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162232 (or 162228 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 38.

The square root of 6488840 is about 2547.3201604824. The cubic root of 6488840 is about 186.5186894136.

The spelling of 6488840 in words is "six million, four hundred eighty-eight thousand, eight hundred forty".