7728163 has 4 divisors (see below), whose sum is σ = 7892640. Its totient is φ = 7563688.

The previous prime is 7728139. The next prime is 7728167. The reversal of 7728163 is 3618277.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3618277 = 13 ⋅278329.

It is a cyclic number.

It is not a de Polignac number, because 7728163 - 2¹⁷ = 7597091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7728167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82168 + ... + 82261.

It is an arithmetic number, because the mean of its divisors is an integer number (1973160).

Almost surely, 2^7728163 is an apocalyptic number.

7728163 is a deficient number, since it is larger than the sum of its proper divisors (164477).

7728163 is a wasteful number, since it uses less digits than its factorization.

7728163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164476.

The product of its digits is 14112, while the sum is 34.

The square root of 7728163 is about 2779.9573737739. The cubic root of 7728163 is about 197.7085379416.

The spelling of 7728163 in words is "seven million, seven hundred twenty-eight thousand, one hundred sixty-three".