6403040 has 48 divisors (see below), whose sum is σ = 17291232. Its totient is φ = 2194944.

The previous prime is 6403031. The next prime is 6403051. The reversal of 6403040 is 403046.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1739 + ... + 3978.

It is an arithmetic number, because the mean of its divisors is an integer number (360234).

Almost surely, 2^6403040 is an apocalyptic number.

It is an amenable number.

6403040 is an abundant number, since it is smaller than the sum of its proper divisors (10888192).

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

6403040 is a wasteful number, since it uses less digits than its factorization.

6403040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5739 (or 5731 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 6403040 is about 2530.4228895582. The cubic root of 6403040 is about 185.6929454205.

Adding to 6403040 its reverse (403046), we get a palindrome (6806086).

The spelling of 6403040 in words is "six million, four hundred three thousand, forty".