420502224 has 80 divisors (see below), whose sum is σ = 1149876800. Its totient is φ = 132046848.

The previous prime is 420502217. The next prime is 420502241. The reversal of 420502224 is 422205024.

It is a self number, because there is not a number n which added to its sum of digits gives 420502224.

It is a congruent number.

It is an unprimeable number.

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, 174822 + ... + 177210.

It is an arithmetic number, because the mean of its divisors is an integer number (14373460).

Almost surely, 2^420502224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 420502224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (574938400).

420502224 is an abundant number, since it is smaller than the sum of its proper divisors (729374576).

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

420502224 is a wasteful number, since it uses less digits than its factorization.

420502224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2612 (or 2606 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 420502224 is about 20506.1508821134. The cubic root of 420502224 is about 749.1856191429.

Adding to 420502224 its reverse (422205024), we get a palindrome (842707248).

The spelling of 420502224 in words is "four hundred twenty million, five hundred two thousand, two hundred twenty-four".