6404190 has 32 divisors (see below), whose sum is σ = 16553376. Its totient is φ = 1576320.

The previous prime is 6404179. The next prime is 6404191. The reversal of 6404190 is 914046.

It is a super-2 number, since 2×6404190² = 82027299112200, which contains 22 as substring.

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 6404190.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6404191) 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, 7821 + ... + 8600.

It is an arithmetic number, because the mean of its divisors is an integer number (517293).

Almost surely, 2^6404190 is an apocalyptic number.

6404190 is an abundant number, since it is smaller than the sum of its proper divisors (10149186).

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

6404190 is a wasteful number, since it uses less digits than its factorization.

6404190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16444.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 6404190 is about 2530.6501141011. The cubic root of 6404190 is about 185.7040617082.

The spelling of 6404190 in words is "six million, four hundred four thousand, one hundred ninety".