204693638 has 8 divisors (see below), whose sum is σ = 308599632. Its totient is φ = 101827096.

The previous prime is 204693581. The next prime is 204693641. The reversal of 204693638 is 836396402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 204693595 and 204693604.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 259370 + ... + 260157.

It is an arithmetic number, because the mean of its divisors is an integer number (38574954).

Almost surely, 2^204693638 is an apocalyptic number.

204693638 is a deficient number, since it is larger than the sum of its proper divisors (103905994).

204693638 is a wasteful number, since it uses less digits than its factorization.

204693638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519726.

The product of its (nonzero) digits is 186624, while the sum is 41.

The square root of 204693638 is about 14307.1184380364. The cubic root of 204693638 is about 589.3429801961.

The spelling of 204693638 in words is "two hundred four million, six hundred ninety-three thousand, six hundred thirty-eight".