528896921 has 12 divisors (see below), whose sum is σ = 624589056. Its totient is φ = 438710760.

The previous prime is 528896917. The next prime is 528896923. The reversal of 528896921 is 129698825.

It is not a de Polignac number, because 528896921 - 2² = 528896917 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 528896921.

It is not an unprimeable number, because it can be changed into a prime (528896923) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32585 + ... + 46038.

It is an arithmetic number, because the mean of its divisors is an integer number (52049088).

Almost surely, 2^528896921 is an apocalyptic number.

It is an amenable number.

528896921 is a deficient number, since it is larger than the sum of its proper divisors (95692135).

528896921 is an equidigital number, since it uses as much as digits as its factorization.

528896921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78692 (or 78661 counting only the distinct ones).

The product of its digits is 622080, while the sum is 50.

The square root of 528896921 is about 22997.7590430024. The cubic root of 528896921 is about 808.7054059613.

The spelling of 528896921 in words is "five hundred twenty-eight million, eight hundred ninety-six thousand, nine hundred twenty-one".