525385728 has 180 divisors, whose sum is σ = 1737961680. Its totient is φ = 149815296.

The previous prime is 525385723. The next prime is 525385747. The reversal of 525385728 is 827583525.

It is not an unprimeable number, because it can be changed into a prime (525385723) 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, 1031938 + ... + 1032446.

Almost surely, 2^525385728 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 525385728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (868980840).

525385728 is an abundant number, since it is smaller than the sum of its proper divisors (1212575952).

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

525385728 is an equidigital number, since it uses as much as digits as its factorization.

525385728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550 (or 521 counting only the distinct ones).

The product of its digits is 672000, while the sum is 45.

The square root of 525385728 is about 22921.2942042983. The cubic root of 525385728 is about 806.9118443617.

The spelling of 525385728 in words is "five hundred twenty-five million, three hundred eighty-five thousand, seven hundred twenty-eight".