204815490 has 96 divisors (see below), whose sum is σ = 572261760. Its totient is φ = 46717440.

The previous prime is 204815489. The next prime is 204815503. The reversal of 204815490 is 94518402.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 60051 + ... + 63369.

It is an arithmetic number, because the mean of its divisors is an integer number (5961060).

Almost surely, 2^204815490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204815490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286130880).

204815490 is an abundant number, since it is smaller than the sum of its proper divisors (367446270).

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

204815490 is a wasteful number, since it uses less digits than its factorization.

204815490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3368 (or 3357 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 204815490 is about 14311.3762440934. The cubic root of 204815490 is about 589.4599002536.

The spelling of 204815490 in words is "two hundred four million, eight hundred fifteen thousand, four hundred ninety".