420203424 has 48 divisors (see below), whose sum is σ = 1129947840. Its totient is φ = 136650240.

The previous prime is 420203401. The next prime is 420203447. The reversal of 420203424 is 424302024.

It is an interprime number because it is at equal distance from previous prime (420203401) and next prime (420203447).

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 420203424.

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 7 ways as a sum of consecutive naturals, for example, 49444 + ... + 57315.

It is an arithmetic number, because the mean of its divisors is an integer number (23540580).

Almost surely, 2^420203424 is an apocalyptic number.

It is an amenable number.

420203424 is an abundant number, since it is smaller than the sum of its proper divisors (709744416).

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

420203424 is a wasteful number, since it uses less digits than its factorization.

420203424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106813 (or 106805 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 420203424 is about 20498.8639685227. The cubic root of 420203424 is about 749.0081252687.

Adding to 420203424 its reverse (424302024), we get a palindrome (844505448).

The spelling of 420203424 in words is "four hundred twenty million, two hundred three thousand, four hundred twenty-four".