420342404 has 6 divisors (see below), whose sum is σ = 735599214. Its totient is φ = 210171200.

The previous prime is 420342397. The next prime is 420342407. The reversal of 420342404 is 404243024.

It can be written as a sum of positive squares in only one way, i.e., 352312900 + 68029504 = 18770^2 + 8248^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 420342404.

It is not an unprimeable number, because it can be changed into a prime (420342407) 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, 52542797 + ... + 52542804.

It is an arithmetic number, because the mean of its divisors is an integer number (122599869).

Almost surely, 2^420342404 is an apocalyptic number.

It is an amenable number.

420342404 is a deficient number, since it is larger than the sum of its proper divisors (315256810).

420342404 is a wasteful number, since it uses less digits than its factorization.

420342404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105085605 (or 105085603 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 23.

The square root of 420342404 is about 20502.2536322230. The cubic root of 420342404 is about 749.0906929561.

Adding to 420342404 its reverse (404243024), we get a palindrome (824585428).

The spelling of 420342404 in words is "four hundred twenty million, three hundred forty-two thousand, four hundred four".