420440330 has 16 divisors (see below), whose sum is σ = 757300320. Its totient is φ = 168063312.

The previous prime is 420440329. The next prime is 420440357. The reversal of 420440330 is 33044024.

It is a happy number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 2477 + ... + 29103.

It is an arithmetic number, because the mean of its divisors is an integer number (47331270).

Almost surely, 2^420440330 is an apocalyptic number.

420440330 is a deficient number, since it is larger than the sum of its proper divisors (336859990).

420440330 is a wasteful number, since it uses less digits than its factorization.

420440330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28213.

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 420440330 is about 20504.6416696318. The cubic root of 420440330 is about 749.1488596307.

Adding to 420440330 its reverse (33044024), we get a palindrome (453484354).

The spelling of 420440330 in words is "four hundred twenty million, four hundred forty thousand, three hundred thirty".