6405830 has 8 divisors (see below), whose sum is σ = 11530512. Its totient is φ = 2562328.

The previous prime is 6405829. The next prime is 6405877. The reversal of 6405830 is 385046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6405830.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320282 + ... + 320301.

It is an arithmetic number, because the mean of its divisors is an integer number (1441314).

Almost surely, 2^6405830 is an apocalyptic number.

6405830 is a deficient number, since it is larger than the sum of its proper divisors (5124682).

6405830 is a wasteful number, since it uses less digits than its factorization.

6405830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640590.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 6405830 is about 2530.9741207685. The cubic root of 6405830 is about 185.7199121992.

The spelling of 6405830 in words is "six million, four hundred five thousand, eight hundred thirty".