235809528 has 64 divisors (see below), whose sum is σ = 604800000. Its totient is φ = 76582272.

The previous prime is 235809521. The next prime is 235809569. The reversal of 235809528 is 825908532.

235809528 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×235809528² = 111212266991165568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 235809528.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (235809521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 393373 + ... + 393971.

It is an arithmetic number, because the mean of its divisors is an integer number (9450000).

Almost surely, 2^235809528 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 235809528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (302400000).

235809528 is an abundant number, since it is smaller than the sum of its proper divisors (368990472).

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

235809528 is a wasteful number, since it uses less digits than its factorization.

235809528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004 (or 1000 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 235809528 is about 15356.0909088218. The cubic root of 235809528 is about 617.8083631992.

The spelling of 235809528 in words is "two hundred thirty-five million, eight hundred nine thousand, five hundred twenty-eight".