525889728 has 336 divisors, whose sum is σ = 1893498880. Its totient is φ = 135862272.

The previous prime is 525889717. The next prime is 525889751. The reversal of 525889728 is 827988525.

525889728 is a `hidden beast` number, since 52 + 588 + 9 + 7 + 2 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (336).

It is an unprimeable number.

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 in 47 ways as a sum of consecutive naturals, for example, 4140801 + ... + 4140927.

Almost surely, 2^525889728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 525889728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (946749440).

525889728 is an abundant number, since it is smaller than the sum of its proper divisors (1367609152).

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

525889728 is a wasteful number, since it uses less digits than its factorization.

525889728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244 (or 231 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 54.

The square root of 525889728 is about 22932.2857125059. The cubic root of 525889728 is about 807.1697841152.

The spelling of 525889728 in words is "five hundred twenty-five million, eight hundred eighty-nine thousand, seven hundred twenty-eight".