523240032 has 144 divisors (see below), whose sum is σ = 1637323632. Its totient is φ = 145797120.

The previous prime is 523240021. The next prime is 523240033. The reversal of 523240032 is 230042325.

It is a super-2 number, since 2×523240032² = 547560262174722048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 523239990 and 523240008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523240033) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 191508 + ... + 194220.

It is an arithmetic number, because the mean of its divisors is an integer number (11370303).

Almost surely, 2^523240032 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 523240032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (818661816).

523240032 is an abundant number, since it is smaller than the sum of its proper divisors (1114083600).

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

523240032 is a wasteful number, since it uses less digits than its factorization.

523240032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2781 (or 2766 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 523240032 is about 22874.4405833236. The cubic root of 523240032 is about 805.8118589572.

Adding to 523240032 its reverse (230042325), we get a palindrome (753282357).

The spelling of 523240032 in words is "five hundred twenty-three million, two hundred forty thousand, thirty-two".