7643648 has 20 divisors (see below), whose sum is σ = 15273390. Its totient is φ = 3821568.

The previous prime is 7643633. The next prime is 7643663. The reversal of 7643648 is 8463467.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7643633) and next prime (7643663).

It can be written as a sum of positive squares in only one way, i.e., 5234944 + 2408704 = 2288^2 + 1552^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6953 + ... + 7976.

Almost surely, 2^7643648 is an apocalyptic number.

It is an amenable number.

7643648 is a deficient number, since it is larger than the sum of its proper divisors (7629742).

7643648 is an equidigital number, since it uses as much as digits as its factorization.

7643648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14947 (or 14931 counting only the distinct ones).

The product of its digits is 96768, while the sum is 38.

The square root of 7643648 is about 2764.7148135025. The cubic root of 7643648 is about 196.9851827347.

The spelling of 7643648 in words is "seven million, six hundred forty-three thousand, six hundred forty-eight".