406199906 has 24 divisors (see below), whose sum is σ = 709491996. Its totient is φ = 173910240.

The previous prime is 406199903. The next prime is 406199933. The reversal of 406199906 is 609991604.

It can be written as a sum of positive squares in 2 ways, for example, as 401641681 + 4558225 = 20041^2 + 2135^2 .

It is not an unprimeable number, because it can be changed into a prime (406199903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 157580 + ... + 160136.

Almost surely, 2^406199906 is an apocalyptic number.

406199906 is a deficient number, since it is larger than the sum of its proper divisors (303292090).

406199906 is a wasteful number, since it uses less digits than its factorization.

406199906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4194 (or 4187 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 406199906 is about 20154.4016532369. The cubic root of 406199906 is about 740.5935741525.

The spelling of 406199906 in words is "four hundred six million, one hundred ninety-nine thousand, nine hundred six".