6404550 has 24 divisors (see below), whose sum is σ = 15883656. Its totient is φ = 1707840.

The previous prime is 6404527. The next prime is 6404551. The reversal of 6404550 is 554046.

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 6404550.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 21199 + ... + 21498.

It is an arithmetic number, because the mean of its divisors is an integer number (661819).

Almost surely, 2^6404550 is an apocalyptic number.

6404550 is an abundant number, since it is smaller than the sum of its proper divisors (9479106).

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

6404550 is a wasteful number, since it uses less digits than its factorization.

6404550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42712 (or 42707 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 6404550 is about 2530.7212410694. The cubic root of 6404550 is about 185.7075413161.

Adding to 6404550 its reverse (554046), we get a palindrome (6958596).

The spelling of 6404550 in words is "six million, four hundred four thousand, five hundred fifty".