420510664 has 32 divisors (see below), whose sum is σ = 909374400. Its totient is φ = 178562880.

The previous prime is 420510659. The next prime is 420510667. The reversal of 420510664 is 466015024.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (420510667) 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 7 ways as a sum of consecutive naturals, for example, 28342 + ... + 40549.

It is an arithmetic number, because the mean of its divisors is an integer number (28417950).

Almost surely, 2^420510664 is an apocalyptic number.

It is an amenable number.

420510664 is an abundant number, since it is smaller than the sum of its proper divisors (488863736).

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

420510664 is a wasteful number, since it uses less digits than its factorization.

420510664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69013 (or 69009 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 420510664 is about 20506.3566729929. The cubic root of 420510664 is about 749.1906314702.

Adding to 420510664 its reverse (466015024), we get a palindrome (886525688).

The spelling of 420510664 in words is "four hundred twenty million, five hundred ten thousand, six hundred sixty-four".