204740 has 24 divisors (see below), whose sum is σ = 446040. Its totient is φ = 78848.

The previous prime is 204733. The next prime is 204749. The reversal of 204740 is 47402.

It can be written as a sum of positive squares in 4 ways, for example, as 16384 + 188356 = 128^2 + 434^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 204740.

It is not an unprimeable number, because it can be changed into a prime (204749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 404 + ... + 756.

It is an arithmetic number, because the mean of its divisors is an integer number (18585).

2²⁰⁴⁷⁴⁰ is an apocalyptic number.

204740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223020).

204740 is an abundant number, since it is smaller than the sum of its proper divisors (241300).

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

204740 is a wasteful number, since it uses less digits than its factorization.

204740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391 (or 389 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 17.

The square root of 204740 is about 452.4820438426. The cubic root of 204740 is about 58.9387471168.

The spelling of 204740 in words is "two hundred four thousand, seven hundred forty", and thus it is an iban number.