6464440 has 16 divisors (see below), whose sum is σ = 14545080. Its totient is φ = 2585760.

The previous prime is 6464431. The next prime is 6464483. The reversal of 6464440 is 444646.

It is a junction number, because it is equal to n+sod(n) for n = 6464399 and 6464408.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80766 + ... + 80845.

Almost surely, 2^6464440 is an apocalyptic number.

It is an amenable number.

6464440 is an abundant number, since it is smaller than the sum of its proper divisors (8080640).

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

6464440 is a wasteful number, since it uses less digits than its factorization.

6464440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161622 (or 161618 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 6464440 is about 2542.5263027155. The cubic root of 6464440 is about 186.2846068750.

The spelling of 6464440 in words is "six million, four hundred sixty-four thousand, four hundred forty".