420304442 has 4 divisors (see below), whose sum is σ = 630456666. Its totient is φ = 210152220.

The previous prime is 420304441. The next prime is 420304459. The reversal of 420304442 is 244403024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 226231681 + 194072761 = 15041^2 + 13931^2 .

It is not an unprimeable number, because it can be changed into a prime (420304441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105076109 + ... + 105076112.

Almost surely, 2^420304442 is an apocalyptic number.

420304442 is a deficient number, since it is larger than the sum of its proper divisors (210152224).

420304442 is a wasteful number, since it uses less digits than its factorization.

420304442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210152223.

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

The square root of 420304442 is about 20501.3278106566. The cubic root of 420304442 is about 749.0681416291.

Adding to 420304442 its reverse (244403024), we get a palindrome (664707466).

The spelling of 420304442 in words is "four hundred twenty million, three hundred four thousand, four hundred forty-two".