305205404 has 24 divisors (see below), whose sum is σ = 623400960. Its totient is φ = 128018736.

The previous prime is 305205337. The next prime is 305205413. The reversal of 305205404 is 404502503.

It is a self number, because there is not a number n which added to its sum of digits gives 305205404.

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, 114644 + ... + 117275.

It is an arithmetic number, because the mean of its divisors is an integer number (25975040).

Almost surely, 2^305205404 is an apocalyptic number.

It is an amenable number.

305205404 is an abundant number, since it is smaller than the sum of its proper divisors (318195556).

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

305205404 is a wasteful number, since it uses less digits than its factorization.

305205404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231977 (or 231975 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 305205404 is about 17470.1289062216. The cubic root of 305205404 is about 673.2826239191.

Adding to 305205404 its reverse (404502503), we get a palindrome (709707907).

The spelling of 305205404 in words is "three hundred five million, two hundred five thousand, four hundred four".