6464140 has 12 divisors (see below), whose sum is σ = 13574736. Its totient is φ = 2585648.

The previous prime is 6464137. The next prime is 6464141. The reversal of 6464140 is 414646.

It is not an unprimeable number, because it can be changed into a prime (6464141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161584 + ... + 161623.

It is an arithmetic number, because the mean of its divisors is an integer number (1131228).

Almost surely, 2^6464140 is an apocalyptic number.

It is an amenable number.

6464140 is an abundant number, since it is smaller than the sum of its proper divisors (7110596).

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

6464140 is a wasteful number, since it uses less digits than its factorization.

6464140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323216 (or 323214 counting only the distinct ones).

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

The square root of 6464140 is about 2542.4673055912. The cubic root of 6464140 is about 186.2817251484.

Adding to 6464140 its reverse (414646), we get a palindrome (6878786).

The spelling of 6464140 in words is "six million, four hundred sixty-four thousand, one hundred forty".