420302664 has 24 divisors (see below), whose sum is σ = 1138319910. Its totient is φ = 140100864.

The previous prime is 420302653. The next prime is 420302669. The reversal of 420302664 is 466203024.

It can be written as a sum of positive squares in only one way, i.e., 263802564 + 156500100 = 16242^2 + 12510^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (420302669) 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 in 5 ways as a sum of consecutive naturals, for example, 2918697 + ... + 2918840.

Almost surely, 2^420302664 is an apocalyptic number.

It is an amenable number.

420302664 is an abundant number, since it is smaller than the sum of its proper divisors (718017246).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

420302664 is a wasteful number, since it uses less digits than its factorization.

420302664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5837549 (or 5837542 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 420302664 is about 20501.2844475657. The cubic root of 420302664 is about 749.0670853749.

Adding to 420302664 its reverse (466203024), we get a palindrome (886505688).

The spelling of 420302664 in words is "four hundred twenty million, three hundred two thousand, six hundred sixty-four".