6467440 has 40 divisors (see below), whose sum is σ = 17186400. Its totient is φ = 2217216.

The previous prime is 6467423. The next prime is 6467441. The reversal of 6467440 is 447646.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6467441) 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, 5215 + ... + 6334.

It is an arithmetic number, because the mean of its divisors is an integer number (429660).

Almost surely, 2^6467440 is an apocalyptic number.

It is an amenable number.

6467440 is an abundant number, since it is smaller than the sum of its proper divisors (10718960).

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

6467440 is a wasteful number, since it uses less digits than its factorization.

6467440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11569 (or 11563 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 6467440 is about 2543.1161986822. The cubic root of 6467440 is about 186.3134192389.

The spelling of 6467440 in words is "six million, four hundred sixty-seven thousand, four hundred forty".