204402406 has 16 divisors (see below), whose sum is σ = 340841088. Its totient is φ = 91296000.

The previous prime is 204402379. The next prime is 204402431. The reversal of 204402406 is 604204402.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 125995 + ... + 127606.

It is an arithmetic number, because the mean of its divisors is an integer number (21302568).

Almost surely, 2^204402406 is an apocalyptic number.

204402406 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

204402406 is a deficient number, since it is larger than the sum of its proper divisors (136438682).

204402406 is a wasteful number, since it uses less digits than its factorization.

204402406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253647.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 204402406 is about 14296.9369446745. The cubic root of 204402406 is about 589.0633476679.

Adding to 204402406 its reverse (604204402), we get a palindrome (808606808).

The spelling of 204402406 in words is "two hundred four million, four hundred two thousand, four hundred six".