6460640 has 48 divisors (see below), whose sum is σ = 15422400. Its totient is φ = 2557440.

The previous prime is 6460613. The next prime is 6460651. The reversal of 6460640 is 460646.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23705 + ... + 23975.

It is an arithmetic number, because the mean of its divisors is an integer number (321300).

Almost surely, 2^6460640 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 6460640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7711200).

6460640 is an abundant number, since it is smaller than the sum of its proper divisors (8961760).

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

6460640 is a wasteful number, since it uses less digits than its factorization.

6460640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435 (or 427 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 6460640 is about 2541.7789046257. The cubic root of 6460640 is about 186.2480984146.

It can be divided in two parts, 64606 and 40, that added together give a palindrome (64646).

The spelling of 6460640 in words is "six million, four hundred sixty thousand, six hundred forty".