420532644 has 48 divisors (see below), whose sum is σ = 1170183168. Its totient is φ = 114927648.

The previous prime is 420532627. The next prime is 420532649. The reversal of 420532644 is 446235024.

It is not an unprimeable number, because it can be changed into a prime (420532649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106902 + ... + 110765.

It is an arithmetic number, because the mean of its divisors is an integer number (24378816).

Almost surely, 2^420532644 is an apocalyptic number.

It is an amenable number.

420532644 is an abundant number, since it is smaller than the sum of its proper divisors (749650524).

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

420532644 is a wasteful number, since it uses less digits than its factorization.

420532644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217704 (or 217702 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

The square root of 420532644 is about 20506.8925973683. The cubic root of 420532644 is about 749.2036845860.

Adding to 420532644 its reverse (446235024), we get a palindrome (866767668).

The spelling of 420532644 in words is "four hundred twenty million, five hundred thirty-two thousand, six hundred forty-four".