204312290 has 128 divisors (see below), whose sum is σ = 491194368. Its totient is φ = 59351040.

The previous prime is 204312259. The next prime is 204312293. The reversal of 204312290 is 92213402.

204312290 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (204312293) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 726950 + ... + 727230.

It is an arithmetic number, because the mean of its divisors is an integer number (3837456).

Almost surely, 2^204312290 is an apocalyptic number.

204312290 is an abundant number, since it is smaller than the sum of its proper divisors (286882078).

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

204312290 is a wasteful number, since it uses less digits than its factorization.

204312290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 204312290 is about 14293.7850130747. The cubic root of 204312290 is about 588.9767670894.

Adding to 204312290 its reverse (92213402), we get a palindrome (296525692).

The spelling of 204312290 in words is "two hundred four million, three hundred twelve thousand, two hundred ninety".