6446394 has 36 divisors (see below), whose sum is σ = 14622426. Its totient is φ = 2052336.

The previous prime is 6446387. The next prime is 6446413. The reversal of 6446394 is 4936446.

6446394 is a `hidden beast` number, since 644 + 6 + 3 + 9 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3470769 + 2975625 = 1863^2 + 1725^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 9184 + ... + 9860.

Almost surely, 2^6446394 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6446394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7311213).

6446394 is an abundant number, since it is smaller than the sum of its proper divisors (8176032).

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

6446394 is a wasteful number, since it uses less digits than its factorization.

6446394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731 (or 705 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 6446394 is about 2538.9749900304. The cubic root of 6446394 is about 186.1111025437. Note that the first 4 decimals are identical.

The spelling of 6446394 in words is "six million, four hundred forty-six thousand, three hundred ninety-four".