7813648 has 10 divisors (see below), whose sum is σ = 15138974. Its totient is φ = 3906816.

The previous prime is 7813639. The next prime is 7813649. The reversal of 7813648 is 8463187.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 7551504 + 262144 = 2748^2 + 512^2 .

It is a super-2 number, since 2×7813648² = 122106190135808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7813649) 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 as a sum of consecutive naturals, namely, 244161 + ... + 244192.

Almost surely, 2^7813648 is an apocalyptic number.

It is an amenable number.

7813648 is a deficient number, since it is larger than the sum of its proper divisors (7325326).

7813648 is a wasteful number, since it uses less digits than its factorization.

7813648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488361 (or 488355 counting only the distinct ones).

The product of its digits is 32256, while the sum is 37.

The square root of 7813648 is about 2795.2903248142. The cubic root of 7813648 is about 198.4348501475.

The spelling of 7813648 in words is "seven million, eight hundred thirteen thousand, six hundred forty-eight".