420523330 has 8 divisors (see below), whose sum is σ = 756942012. Its totient is φ = 168209328.

The previous prime is 420523223. The next prime is 420523331. The reversal of 420523330 is 33325024.

It can be written as a sum of positive squares in 2 ways, for example, as 368524809 + 51998521 = 19197^2 + 7211^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (420523331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21026157 + ... + 21026176.

Almost surely, 2^420523330 is an apocalyptic number.

420523330 is a deficient number, since it is larger than the sum of its proper divisors (336418682).

420523330 is a wasteful number, since it uses less digits than its factorization.

420523330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42052340.

The product of its (nonzero) digits is 2160, while the sum is 22.

The square root of 420523330 is about 20506.6655017338. The cubic root of 420523330 is about 749.1981533986.

Adding to 420523330 its reverse (33325024), we get a palindrome (453848354).

The spelling of 420523330 in words is "four hundred twenty million, five hundred twenty-three thousand, three hundred thirty".