6416440 has 32 divisors (see below), whose sum is σ = 14748480. Its totient is φ = 2511232.

The previous prime is 6416437. The next prime is 6416447. The reversal of 6416440 is 446146.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6416447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174 + ... + 3586.

It is an arithmetic number, because the mean of its divisors is an integer number (460890).

Almost surely, 2^6416440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6416440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7374240).

6416440 is an abundant number, since it is smaller than the sum of its proper divisors (8332040).

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

6416440 is a wasteful number, since it uses less digits than its factorization.

6416440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3471 (or 3467 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 6416440 is about 2533.0692844847. The cubic root of 6416440 is about 185.8223918341.

The spelling of 6416440 in words is "six million, four hundred sixteen thousand, four hundred forty".