406822820 has 12 divisors (see below), whose sum is σ = 854327964. Its totient is φ = 162729120.

The previous prime is 406822811. The next prime is 406822883. The reversal of 406822820 is 28228604.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 60341824 + 346480996 = 7768^2 + 18614^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 10170551 + ... + 10170590.

It is an arithmetic number, because the mean of its divisors is an integer number (71193997).

Almost surely, 2^406822820 is an apocalyptic number.

It is an amenable number.

406822820 is an abundant number, since it is smaller than the sum of its proper divisors (447505144).

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

406822820 is a wasteful number, since it uses less digits than its factorization.

406822820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20341150 (or 20341148 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 406822820 is about 20169.8492805474. The cubic root of 406822820 is about 740.9719514675.

The spelling of 406822820 in words is "four hundred six million, eight hundred twenty-two thousand, eight hundred twenty".