7775648 has 12 divisors (see below), whose sum is σ = 15308370. Its totient is φ = 3887808.

The previous prime is 7775641. The next prime is 7775657. The reversal of 7775648 is 8465777.

It can be written as a sum of positive squares in only one way, i.e., 7772944 + 2704 = 2788^2 + 52^2 .

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 a junction number, because it is equal to n+sod(n) for n = 7775599 and 7775608.

It is not an unprimeable number, because it can be changed into a prime (7775641) 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, 121463 + ... + 121526.

Almost surely, 2^7775648 is an apocalyptic number.

It is an amenable number.

7775648 is a deficient number, since it is larger than the sum of its proper divisors (7532722).

7775648 is a wasteful number, since it uses less digits than its factorization.

7775648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242999 (or 242991 counting only the distinct ones).

The product of its digits is 329280, while the sum is 44.

The square root of 7775648 is about 2788.4848932709. The cubic root of 7775648 is about 198.1126454894.

The spelling of 7775648 in words is "seven million, seven hundred seventy-five thousand, six hundred forty-eight".