420304402 has 16 divisors (see below), whose sum is σ = 721828800. Its totient is φ = 179803728.

The previous prime is 420304397. The next prime is 420304429. The reversal of 420304402 is 204403024.

It is a self number, because there is not a number n which added to its sum of digits gives 420304402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19152 + ... + 34747.

It is an arithmetic number, because the mean of its divisors is an integer number (45114300).

Almost surely, 2^420304402 is an apocalyptic number.

420304402 is a deficient number, since it is larger than the sum of its proper divisors (301524398).

420304402 is a wasteful number, since it uses less digits than its factorization.

420304402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54465.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 420304402 is about 20501.3268351100. The cubic root of 420304402 is about 749.0681178664.

Adding to 420304402 its reverse (204403024), we get a palindrome (624707426).

The spelling of 420304402 in words is "four hundred twenty million, three hundred four thousand, four hundred two".