7649864 has 16 divisors (see below), whose sum is σ = 15187500. Its totient is φ = 3599872.

The previous prime is 7649849. The next prime is 7649867. The reversal of 7649864 is 4689467.

It can be written as a sum of positive squares in 2 ways, for example, as 6461764 + 1188100 = 2542^2 + 1090^2 .

It is not an unprimeable number, because it can be changed into a prime (7649867) by changing a digit.

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, 27989 + ... + 28260.

Almost surely, 2^7649864 is an apocalyptic number.

It is an amenable number.

7649864 is a deficient number, since it is larger than the sum of its proper divisors (7537636).

7649864 is a wasteful number, since it uses less digits than its factorization.

7649864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56272 (or 56268 counting only the distinct ones).

The product of its digits is 290304, while the sum is 44.

The square root of 7649864 is about 2765.8387516267. The cubic root of 7649864 is about 197.0385659763.

The spelling of 7649864 in words is "seven million, six hundred forty-nine thousand, eight hundred sixty-four".