420043604 has 6 divisors (see below), whose sum is σ = 735076314. Its totient is φ = 210021800.

The previous prime is 420043601. The next prime is 420043639. The reversal of 420043604 is 406340024.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 414041104 + 6002500 = 20348^2 + 2450^2 .

It is a super-3 number, since 3×420043604³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 420043604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420043601) by changing a digit.

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 as a sum of consecutive naturals, namely, 52505447 + ... + 52505454.

It is an arithmetic number, because the mean of its divisors is an integer number (122512719).

Almost surely, 2^420043604 is an apocalyptic number.

It is an amenable number.

420043604 is a deficient number, since it is larger than the sum of its proper divisors (315032710).

420043604 is a wasteful number, since it uses less digits than its factorization.

420043604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105010905 (or 105010903 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 420043604 is about 20494.9653329787. The cubic root of 420043604 is about 748.9131540783.

Adding to 420043604 its reverse (406340024), we get a palindrome (826383628).

The spelling of 420043604 in words is "four hundred twenty million, forty-three thousand, six hundred four".