6649288 has 8 divisors (see below), whose sum is σ = 12467430. Its totient is φ = 3324640.

The previous prime is 6649273. The next prime is 6649289. The reversal of 6649288 is 8829466.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 5116644 + 1532644 = 2262^2 + 1238^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (6649289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415573 + ... + 415588.

Almost surely, 2^6649288 is an apocalyptic number.

It is an amenable number.

6649288 is a deficient number, since it is larger than the sum of its proper divisors (5818142).

6649288 is a wasteful number, since it uses less digits than its factorization.

6649288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831167 (or 831163 counting only the distinct ones).

The product of its digits is 165888, while the sum is 43.

The square root of 6649288 is about 2578.6213370714. The cubic root of 6649288 is about 188.0435239504.

The spelling of 6649288 in words is "six million, six hundred forty-nine thousand, two hundred eighty-eight".