6404290 has 32 divisors (see below), whose sum is σ = 12105216. Its totient is φ = 2436480.

The previous prime is 6404269. The next prime is 6404297. The reversal of 6404290 is 924046.

It is not an unprimeable number, because it can be changed into a prime (6404297) 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, 22489 + ... + 22771.

It is an arithmetic number, because the mean of its divisors is an integer number (378288).

Almost surely, 2^6404290 is an apocalyptic number.

6404290 is a deficient number, since it is larger than the sum of its proper divisors (5700926).

6404290 is a wasteful number, since it uses less digits than its factorization.

6404290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 6404290 is about 2530.6698717928. The cubic root of 6404290 is about 185.7050282790.

The spelling of 6404290 in words is "six million, four hundred four thousand, two hundred ninety".