305404 has 18 divisors (see below), whose sum is σ = 588392. Its totient is φ = 138600.

The previous prime is 305401. The next prime is 305407. The reversal of 305404 is 404503.

It is an interprime number because it is at equal distance from previous prime (305401) and next prime (305407).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 169 + ... + 799.

2³⁰⁵⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

305404 is a deficient number, since it is larger than the sum of its proper divisors (282988).

305404 is a wasteful number, since it uses less digits than its factorization.

305404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657 (or 644 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 305404 is about 552.6336942315. The cubic root of 305404 is about 67.3428626407.

Adding to 305404 its reverse (404503), we get a palindrome (709907).

Subtracting 305404 from its reverse (404503), we obtain a palindrome (99099).

The spelling of 305404 in words is "three hundred five thousand, four hundred four".