7856648 has 12 divisors (see below), whose sum is σ = 14746095. Its totient is φ = 3924360.

The previous prime is 7856603. The next prime is 7856663. The reversal of 7856648 is 8466587.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 3928324 + 3928324 = 1982^2 + 1982^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=1982.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7856599 and 7856608.

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 2 ways as a sum of consecutive naturals, for example, 7433 + ... + 8423.

Almost surely, 2^7856648 is an apocalyptic number.

It is an amenable number.

7856648 is a deficient number, since it is larger than the sum of its proper divisors (6889447).

7856648 is an frugal number, since it uses more digits than its factorization.

7856648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1988 (or 993 counting only the distinct ones).

The product of its digits is 322560, while the sum is 44.

The square root of 7856648 is about 2802.9712806235. The cubic root of 7856648 is about 198.7981927620.

The spelling of 7856648 in words is "seven million, eight hundred fifty-six thousand, six hundred forty-eight".