28640753 has 2 divisors, whose sum is σ = 28640754. Its totient is φ = 28640752.

The previous prime is 28640741. The next prime is 28640779. The reversal of 28640753 is 35704682.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24285184 + 4355569 = 4928^2 + 2087^2 .

It is a cyclic number.

It is not a de Polignac number, because 28640753 - 2⁴ = 28640737 is a prime.

It is a super-3 number, since 3×28640753³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (28640713) 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 as a sum of consecutive naturals, namely, 14320376 + 14320377.

It is an arithmetic number, because the mean of its divisors is an integer number (14320377).

Almost surely, 2^28640753 is an apocalyptic number.

It is an amenable number.

28640753 is a deficient number, since it is larger than the sum of its proper divisors (1).

28640753 is an equidigital number, since it uses as much as digits as its factorization.

28640753 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 28640753 is about 5351.7056159695. The cubic root of 28640753 is about 305.9577632621.

The spelling of 28640753 in words is "twenty-eight million, six hundred forty thousand, seven hundred fifty-three".