420444442 has 32 divisors (see below), whose sum is σ = 742250304. Its totient is φ = 176467200.

The previous prime is 420444433. The next prime is 420444457. The reversal of 420444442 is 244444024.

It is a self number, because there is not a number n which added to its sum of digits gives 420444442.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9217 + ... + 30427.

It is an arithmetic number, because the mean of its divisors is an integer number (23195322).

Almost surely, 2^420444442 is an apocalyptic number.

420444442 is a deficient number, since it is larger than the sum of its proper divisors (321805862).

420444442 is a wasteful number, since it uses less digits than its factorization.

420444442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21294.

The product of its (nonzero) digits is 16384, while the sum is 28.

The square root of 420444442 is about 20504.7419393661. The cubic root of 420444442 is about 749.1513019036.

Adding to 420444442 its reverse (244444024), we get a palindrome (664888466).

The spelling of 420444442 in words is "four hundred twenty million, four hundred forty-four thousand, four hundred forty-two".