7728349 has 2 divisors, whose sum is σ = 7728350. Its totient is φ = 7728348.

The previous prime is 7728341. The next prime is 7728359. The reversal of 7728349 is 9438277.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7252249 + 476100 = 2693^2 + 690^2 .

It is an emirp because it is prime and its reverse (9438277) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7728349 - 2³ = 7728341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7728341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3864174 + 3864175.

It is an arithmetic number, because the mean of its divisors is an integer number (3864175).

Almost surely, 2^7728349 is an apocalyptic number.

It is an amenable number.

7728349 is a deficient number, since it is larger than the sum of its proper divisors (1).

7728349 is an equidigital number, since it uses as much as digits as its factorization.

7728349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 40.

The square root of 7728349 is about 2779.9908273230. The cubic root of 7728349 is about 197.7101240664.

The spelling of 7728349 in words is "seven million, seven hundred twenty-eight thousand, three hundred forty-nine".