406820220 has 48 divisors (see below), whose sum is σ = 1140023808. Its totient is φ = 108397120.

The previous prime is 406820189. The next prime is 406820221. The reversal of 406820220 is 22028604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406820221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108985 + ... + 112655.

It is an arithmetic number, because the mean of its divisors is an integer number (23750496).

Almost surely, 2^406820220 is an apocalyptic number.

It is an amenable number.

406820220 is an abundant number, since it is smaller than the sum of its proper divisors (733203588).

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

406820220 is a wasteful number, since it uses less digits than its factorization.

406820220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5530 (or 5528 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 406820220 is about 20169.7848278062. The cubic root of 406820220 is about 740.9703729497.

Adding to 406820220 its reverse (22028604), we get a palindrome (428848824).

The spelling of 406820220 in words is "four hundred six million, eight hundred twenty thousand, two hundred twenty".