420020444 has 6 divisors (see below), whose sum is σ = 735035784. Its totient is φ = 210010220.

The previous prime is 420020443. The next prime is 420020449. The reversal of 420020444 is 444020024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420020443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52502552 + ... + 52502559.

It is an arithmetic number, because the mean of its divisors is an integer number (122505964).

Almost surely, 2^420020444 is an apocalyptic number.

It is an amenable number.

420020444 is a deficient number, since it is larger than the sum of its proper divisors (315015340).

420020444 is a wasteful number, since it uses less digits than its factorization.

420020444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105005115 (or 105005113 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 420020444 is about 20494.4003083769. The cubic root of 420020444 is about 748.8993895173.

Adding to 420020444 its reverse (444020024), we get a palindrome (864040468).

The spelling of 420020444 in words is "four hundred twenty million, twenty thousand, four hundred forty-four".