6403430 has 32 divisors (see below), whose sum is σ = 13125888. Its totient is φ = 2226400.

The previous prime is 6403429. The next prime is 6403433. The reversal of 6403430 is 343046.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6403433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1265 + ... + 3795.

It is an arithmetic number, because the mean of its divisors is an integer number (410184).

Almost surely, 2^6403430 is an apocalyptic number.

It is a pronic number, being equal to 2530×2531.

6403430 is an abundant number, since it is smaller than the sum of its proper divisors (6722458).

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

6403430 is a wasteful number, since it uses less digits than its factorization.

6403430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2572.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 6403430 is about 2530.4999506026. The cubic root of 6403430 is about 185.6967154412.

Adding to 6403430 its reverse (343046), we get a palindrome (6746476).

The spelling of 6403430 in words is "six million, four hundred three thousand, four hundred thirty".