420555438 has 24 divisors (see below), whose sum is σ = 921445200. Its totient is φ = 138609504.

The previous prime is 420555427. The next prime is 420555467. The reversal of 420555438 is 834555024.

It is a Curzon number.

It is a congruent 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 11 ways as a sum of consecutive naturals, for example, 129658 + ... + 132861.

It is an arithmetic number, because the mean of its divisors is an integer number (38393550).

Almost surely, 2^420555438 is an apocalyptic number.

420555438 is an abundant number, since it is smaller than the sum of its proper divisors (500889762).

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

420555438 is a wasteful number, since it uses less digits than its factorization.

420555438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262616 (or 262613 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

The square root of 420555438 is about 20507.4483541956. The cubic root of 420555438 is about 749.2172206262.

The spelling of 420555438 in words is "four hundred twenty million, five hundred fifty-five thousand, four hundred thirty-eight".