420217860 has 48 divisors (see below), whose sum is σ = 1181831616. Its totient is φ = 111560832.

The previous prime is 420217841. The next prime is 420217877. The reversal of 420217860 is 68712024.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1807 + ... + 29046.

It is an arithmetic number, because the mean of its divisors is an integer number (24621492).

Almost surely, 2^420217860 is an apocalyptic number.

It is an amenable number.

420217860 is an abundant number, since it is smaller than the sum of its proper divisors (761613756).

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

420217860 is a wasteful number, since it uses less digits than its factorization.

420217860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31092 (or 31090 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 420217860 is about 20499.2160825725. The cubic root of 420217860 is about 749.0167025092.

Adding to 420217860 its reverse (68712024), we get a palindrome (488929884).

The spelling of 420217860 in words is "four hundred twenty million, two hundred seventeen thousand, eight hundred sixty".