6648394 has 8 divisors (see below), whose sum is σ = 10559268. Its totient is φ = 3128640.

The previous prime is 6648371. The next prime is 6648401. The reversal of 6648394 is 4938466.

It can be written as a sum of positive squares in 2 ways, for example, as 6579225 + 69169 = 2565^2 + 263^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×6648394² = 88402285558472, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97737 + ... + 97804.

Almost surely, 2^6648394 is an apocalyptic number.

6648394 is a deficient number, since it is larger than the sum of its proper divisors (3910874).

6648394 is a wasteful number, since it uses less digits than its factorization.

6648394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195560.

The product of its digits is 124416, while the sum is 40.

The square root of 6648394 is about 2578.4479827990. The cubic root of 6648394 is about 188.0350960584.

The spelling of 6648394 in words is "six million, six hundred forty-eight thousand, three hundred ninety-four".