7728533 has 2 divisors, whose sum is σ = 7728534. Its totient is φ = 7728532.

The previous prime is 7728527. The next prime is 7728551. The reversal of 7728533 is 3358277.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6848689 + 879844 = 2617^2 + 938^2 .

It is a cyclic number.

It is not a de Polignac number, because 7728533 - 2²⁰ = 6679957 is a prime.

It is a Sophie Germain prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 7⁴ + 7⁸ + 2¹³ + 8 + 5⁹ + 3 + 3 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7728493 and 7728502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7028533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3864266 + 3864267.

It is an arithmetic number, because the mean of its divisors is an integer number (3864267).

Almost surely, 2^7728533 is an apocalyptic number.

It is an amenable number.

7728533 is a deficient number, since it is larger than the sum of its proper divisors (1).

7728533 is an equidigital number, since it uses as much as digits as its factorization.

7728533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35280, while the sum is 35.

The square root of 7728533 is about 2780.0239207604. The cubic root of 7728533 is about 197.7116931110.

The spelling of 7728533 in words is "seven million, seven hundred twenty-eight thousand, five hundred thirty-three".