205030404 has 144 divisors (see below), whose sum is σ = 577414656. Its totient is φ = 61056000.

The previous prime is 205030361. The next prime is 205030411. The reversal of 205030404 is 404030502.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent 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, 1916119 + ... + 1916225.

It is an arithmetic number, because the mean of its divisors is an integer number (4009824).

Almost surely, 2^205030404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 205030404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288707328).

205030404 is an abundant number, since it is smaller than the sum of its proper divisors (372384252).

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

205030404 is a wasteful number, since it uses less digits than its factorization.

205030404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266 (or 261 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 205030404 is about 14318.8827776471. The cubic root of 205030404 is about 589.6660026681. Note that the first 3 decimals are identical.

Adding to 205030404 its reverse (404030502), we get a palindrome (609060906).

The spelling of 205030404 in words is "two hundred five million, thirty thousand, four hundred four".