406220004 has 18 divisors (see below), whose sum is σ = 1026833990. Its totient is φ = 135406656.

The previous prime is 406219999. The next prime is 406220021. The reversal of 406220004 is 400022604.

406220004 is a `hidden beast` number, since 40 + 622 + 0 + 0 + 0 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 402804900 + 3415104 = 20070^2 + 1848^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5641909 + ... + 5641980.

Almost surely, 2^406220004 is an apocalyptic number.

It is an amenable number.

406220004 is an abundant number, since it is smaller than the sum of its proper divisors (620613986).

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

406220004 is a wasteful number, since it uses less digits than its factorization.

406220004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11283899 (or 11283894 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 406220004 is about 20154.9002478306. The cubic root of 406220004 is about 740.6057883389.

Adding to 406220004 its reverse (400022604), we get a palindrome (806242608).

The spelling of 406220004 in words is "four hundred six million, two hundred twenty thousand, four".