423520540 has 12 divisors (see below), whose sum is σ = 889393176. Its totient is φ = 169408208.

The previous prime is 423520477. The next prime is 423520549. The reversal of 423520540 is 45025324.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423520549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10587994 + ... + 10588033.

It is an arithmetic number, because the mean of its divisors is an integer number (74116098).

Almost surely, 2^423520540 is an apocalyptic number.

It is an amenable number.

423520540 is an abundant number, since it is smaller than the sum of its proper divisors (465872636).

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

423520540 is a wasteful number, since it uses less digits than its factorization.

423520540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21176036 (or 21176034 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 423520540 is about 20579.6146708339. The cubic root of 423520540 is about 750.9738697045.

Adding to 423520540 its reverse (45025324), we get a palindrome (468545864).

The spelling of 423520540 in words is "four hundred twenty-three million, five hundred twenty thousand, five hundred forty".