6404346 has 40 divisors (see below), whose sum is σ = 15459444. Its totient is φ = 1969920.

The previous prime is 6404341. The next prime is 6404347. The reversal of 6404346 is 6434046.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6305121 + 99225 = 2511^2 + 315^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (6404341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 586 + ... + 3626.

Almost surely, 2^6404346 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6404346, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7729722).

6404346 is an abundant number, since it is smaller than the sum of its proper divisors (9055098).

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

6404346 is a wasteful number, since it uses less digits than its factorization.

6404346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3068 (or 3059 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 6404346 is about 2530.6809360328. The cubic root of 6404346 is about 185.7055695543.

The spelling of 6404346 in words is "six million, four hundred four thousand, three hundred forty-six".