6410640 has 40 divisors (see below), whose sum is σ = 19873728. Its totient is φ = 1709440.

The previous prime is 6410639. The next prime is 6410647. The reversal of 6410640 is 460146.

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

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (6410647) 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, 13116 + ... + 13595.

Almost surely, 2^6410640 is an apocalyptic number.

6410640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6410640 is an abundant number, since it is smaller than the sum of its proper divisors (13463088).

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

6410640 is a wasteful number, since it uses less digits than its factorization.

6410640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26727 (or 26721 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 6410640 is about 2531.9241694806. The cubic root of 6410640 is about 185.7663849322.

Adding to 6410640 its reverse (460146), we get a palindrome (6870786).

It can be divided in two parts, 64106 and 40, that added together give a palindrome (64146).

The spelling of 6410640 in words is "six million, four hundred ten thousand, six hundred forty".