6404442 has 32 divisors (see below), whose sum is σ = 14584320. Its totient is φ = 1855920.

The previous prime is 6404407. The next prime is 6404449. The reversal of 6404442 is 2444046.

It is not an unprimeable number, because it can be changed into a prime (6404449) 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, 592 + ... + 3627.

It is an arithmetic number, because the mean of its divisors is an integer number (455760).

Almost surely, 2^6404442 is an apocalyptic number.

6404442 is an abundant number, since it is smaller than the sum of its proper divisors (8179878).

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

6404442 is a wasteful number, since it uses less digits than its factorization.

6404442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4258.

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 6404442 is about 2530.6999031888. The cubic root of 6404442 is about 185.7064974474.

Adding to 6404442 its reverse (2444046), we get a palindrome (8848488).

The spelling of 6404442 in words is "six million, four hundred four thousand, four hundred forty-two".