6404556 has 12 divisors (see below), whose sum is σ = 14943992. Its totient is φ = 2134848.

The previous prime is 6404551. The next prime is 6404581. The reversal of 6404556 is 6554046.

6404556 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (6404551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266845 + ... + 266868.

Almost surely, 2^6404556 is an apocalyptic number.

It is an amenable number.

6404556 is an abundant number, since it is smaller than the sum of its proper divisors (8539436).

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

6404556 is a wasteful number, since it uses less digits than its factorization.

6404556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533720 (or 533718 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 6404556 is about 2530.7224265020. The cubic root of 6404556 is about 185.7075993084.

The spelling of 6404556 in words is "six million, four hundred four thousand, five hundred fifty-six".