528840089 has 4 divisors (see below), whose sum is σ = 529080420. Its totient is φ = 528599760.

The previous prime is 528840079. The next prime is 528840121. The reversal of 528840089 is 980048825.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 242113600 + 286726489 = 15560^2 + 16933^2 .

It is a cyclic number.

It is not a de Polignac number, because 528840089 - 2⁴ = 528840073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (528840019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116834 + ... + 121275.

It is an arithmetic number, because the mean of its divisors is an integer number (132270105).

Almost surely, 2^528840089 is an apocalyptic number.

It is an amenable number.

528840089 is a deficient number, since it is larger than the sum of its proper divisors (240331).

528840089 is a wasteful number, since it uses less digits than its factorization.

528840089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240330.

The product of its (nonzero) digits is 184320, while the sum is 44.

The square root of 528840089 is about 22996.5234111593. The cubic root of 528840089 is about 808.6764387592.

The spelling of 528840089 in words is "five hundred twenty-eight million, eight hundred forty thousand, eighty-nine".