528770025 has 135 divisors (see below), whose sum is σ = 1155199221. Its totient is φ = 238412160.

The previous prime is 528770003. The next prime is 528770027. The reversal of 528770025 is 520077825.

The square root of 528770025 is 22995.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 2893401 + 525876624 = 1701^2 + 22932^2 .

It is a tau number, because it is divible by the number of its divisors (135).

It is not a de Polignac number, because 528770025 - 2⁷ = 528769897 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (528770027) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 7243389 + ... + 7243461.

Almost surely, 2^528770025 is an apocalyptic number.

528770025 is the 22995-th square number.

528770025 is the 11498-th centered octagonal number.

It is an amenable number.

528770025 is an abundant number, since it is smaller than the sum of its proper divisors (626429196).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

528770025 is an equidigital number, since it uses as much as digits as its factorization.

528770025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 36.

The cubic root of 528770025 is about 808.6407243662.

Multiplying 528770025 by its sum of digits (36), we get a square (19035720900 = 137970²).

The spelling of 528770025 in words is "five hundred twenty-eight million, seven hundred seventy thousand, twenty-five".