6644898 has 48 divisors (see below), whose sum is σ = 15757560. Its totient is φ = 2011392.

The previous prime is 6644887. The next prime is 6644903. The reversal of 6644898 is 8984466.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3932289 + 2712609 = 1983^2 + 1647^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16888 + ... + 17276.

Almost surely, 2^6644898 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6644898, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7878780).

6644898 is an abundant number, since it is smaller than the sum of its proper divisors (9112662).

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

6644898 is a wasteful number, since it uses less digits than its factorization.

6644898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483 (or 480 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 6644898 is about 2577.7699664633. The cubic root of 6644898 is about 188.0021314079.

The spelling of 6644898 in words is "six million, six hundred forty-four thousand, eight hundred ninety-eight".