420340324 has 12 divisors (see below), whose sum is σ = 740533500. Its totient is φ = 208759328.

The previous prime is 420340307. The next prime is 420340373. The reversal of 420340324 is 423043024.

It can be written as a sum of positive squares in 2 ways, for example, as 255680100 + 164660224 = 15990^2 + 12832^2 .

It is a junction number, because it is equal to n+sod(n) for n = 420340295 and 420340304.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 352039 + ... + 353230.

It is an arithmetic number, because the mean of its divisors is an integer number (61711125).

Almost surely, 2^420340324 is an apocalyptic number.

It is an amenable number.

420340324 is a deficient number, since it is larger than the sum of its proper divisors (320193176).

420340324 is a wasteful number, since it uses less digits than its factorization.

420340324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705422 (or 705420 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 420340324 is about 20502.2029060294. The cubic root of 420340324 is about 749.0894573672.

Adding to 420340324 its reverse (423043024), we get a palindrome (843383348).

The spelling of 420340324 in words is "four hundred twenty million, three hundred forty thousand, three hundred twenty-four".