204638534 has 8 divisors (see below), whose sum is σ = 307652040. Its totient is φ = 102087856.

The previous prime is 204638509. The next prime is 204638549. The reversal of 204638534 is 435836402.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 204638494 and 204638503.

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, 114599 + ... + 116370.

It is an arithmetic number, because the mean of its divisors is an integer number (38456505).

Almost surely, 2^204638534 is an apocalyptic number.

204638534 is a deficient number, since it is larger than the sum of its proper divisors (103013506).

204638534 is a wasteful number, since it uses less digits than its factorization.

204638534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231414.

The product of its (nonzero) digits is 69120, while the sum is 35.

The square root of 204638534 is about 14305.1925537547. The cubic root of 204638534 is about 589.2900912862.

The spelling of 204638534 in words is "two hundred four million, six hundred thirty-eight thousand, five hundred thirty-four".