240821532 has 96 divisors (see below), whose sum is σ = 720115200. Its totient is φ = 68173056.

The previous prime is 240821521. The next prime is 240821533. The reversal of 240821532 is 235128042.

240821532 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 240821496 and 240821505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240821533) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84019 + ... + 86837.

It is an arithmetic number, because the mean of its divisors is an integer number (7501200).

Almost surely, 2^240821532 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 240821532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (360057600).

240821532 is an abundant number, since it is smaller than the sum of its proper divisors (479293668).

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

240821532 is a wasteful number, since it uses less digits than its factorization.

240821532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2952 (or 2944 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 240821532 is about 15518.4255644701. The cubic root of 240821532 is about 622.1547744682.

Adding to 240821532 its reverse (235128042), we get a palindrome (475949574).

The spelling of 240821532 in words is "two hundred forty million, eight hundred twenty-one thousand, five hundred thirty-two".