204380 has 24 divisors (see below), whose sum is σ = 468720. Its totient is φ = 74240.

The previous prime is 204377. The next prime is 204397. The reversal of 204380 is 83402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 245 + ... + 684.

It is an arithmetic number, because the mean of its divisors is an integer number (19530).

2²⁰⁴³⁸⁰ is an apocalyptic number.

204380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204380 is an abundant number, since it is smaller than the sum of its proper divisors (264340).

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

204380 is a wasteful number, since it uses less digits than its factorization.

204380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949 (or 947 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 204380 is about 452.0840629794. The cubic root of 204380 is about 58.9041823075.

Adding to 204380 its reverse (83402), we get a palindrome (287782).

The spelling of 204380 in words is "two hundred four thousand, three hundred eighty".