204747138 has 24 divisors (see below), whose sum is σ = 445924908. Its totient is φ = 67894272.

The previous prime is 204747107. The next prime is 204747149. The reversal of 204747138 is 831747402.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 160351569 + 44395569 = 12663^2 + 6663^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25995 + ... + 32942.

Almost surely, 2^204747138 is an apocalyptic number.

204747138 is an abundant number, since it is smaller than the sum of its proper divisors (241177770).

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

204747138 is a wasteful number, since it uses less digits than its factorization.

204747138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59138 (or 59135 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 204747138 is about 14308.9880145313. The cubic root of 204747138 is about 589.3943205035.

The spelling of 204747138 in words is "two hundred four million, seven hundred forty-seven thousand, one hundred thirty-eight".