6448840 has 16 divisors (see below), whose sum is σ = 14509980. Its totient is φ = 2579520.

The previous prime is 6448811. The next prime is 6448853. The reversal of 6448840 is 488446.

It can be written as a sum of positive squares in 2 ways, for example, as 6441444 + 7396 = 2538^2 + 86^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6448796 and 6448805.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80571 + ... + 80650.

Almost surely, 2^6448840 is an apocalyptic number.

It is an amenable number.

6448840 is an abundant number, since it is smaller than the sum of its proper divisors (8061140).

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

6448840 is a wasteful number, since it uses less digits than its factorization.

6448840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161232 (or 161228 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 34.

The square root of 6448840 is about 2539.4566347941. The cubic root of 6448840 is about 186.1346387094.

The spelling of 6448840 in words is "six million, four hundred forty-eight thousand, eight hundred forty".