6404818 has 24 divisors (see below), whose sum is σ = 11670912. Its totient is φ = 2581824.

The previous prime is 6404809. The next prime is 6404819. The reversal of 6404818 is 8184046.

It is a super-2 number, since 2×6404818² = 82043387226248, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6404818.

It is not an unprimeable number, because it can be changed into a prime (6404819) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3255 + ... + 4837.

It is an arithmetic number, because the mean of its divisors is an integer number (486288).

Almost surely, 2^6404818 is an apocalyptic number.

6404818 is a deficient number, since it is larger than the sum of its proper divisors (5266094).

6404818 is a wasteful number, since it uses less digits than its factorization.

6404818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1626 (or 1609 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 6404818 is about 2530.7741898478. The cubic root of 6404818 is about 185.7101316062.

The spelling of 6404818 in words is "six million, four hundred four thousand, eight hundred eighteen".