528028681 has 2 divisors, whose sum is σ = 528028682. Its totient is φ = 528028680.

The previous prime is 528028667. The next prime is 528028703. The reversal of 528028681 is 186820825.

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., 455438281 + 72590400 = 21341^2 + 8520^2 .

It is a cyclic number.

It is not a de Polignac number, because 528028681 - 2⁹ = 528028169 is a prime.

It is a super-2 number, since 2×528028681² = 557628575917199522, which contains 22 as substring.

It is equal to p_27752566 and since 528028681 and 27752566 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (528028661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 264014340 + 264014341.

It is an arithmetic number, because the mean of its divisors is an integer number (264014341).

Almost surely, 2^528028681 is an apocalyptic number.

It is an amenable number.

528028681 is a deficient number, since it is larger than the sum of its proper divisors (1).

528028681 is an equidigital number, since it uses as much as digits as its factorization.

528028681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61440, while the sum is 40.

The square root of 528028681 is about 22978.8746678335. The cubic root of 528028681 is about 808.2626385571.

The spelling of 528028681 in words is "five hundred twenty-eight million, twenty-eight thousand, six hundred eighty-one".