6404218 has 8 divisors (see below), whose sum is σ = 9655200. Its totient is φ = 3185820.

The previous prime is 6404191. The next prime is 6404227. The reversal of 6404218 is 8124046.

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

It is a junction number, because it is equal to n+sod(n) for n = 6404192 and 6404201.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7648 + ... + 8443.

It is an arithmetic number, because the mean of its divisors is an integer number (1206900).

Almost surely, 2^6404218 is an apocalyptic number.

6404218 is a deficient number, since it is larger than the sum of its proper divisors (3250982).

6404218 is a wasteful number, since it uses less digits than its factorization.

6404218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16292.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 6404218 is about 2530.6556462703. The cubic root of 6404218 is about 185.7043323491.

The spelling of 6404218 in words is "six million, four hundred four thousand, two hundred eighteen".