305404906 has 4 divisors (see below), whose sum is σ = 458107362. Its totient is φ = 152702452.

The previous prime is 305404889. The next prime is 305404909. The reversal of 305404906 is 609404503.

305404906 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 298978681 + 6426225 = 17291^2 + 2535^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (305404909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76351225 + ... + 76351228.

Almost surely, 2^305404906 is an apocalyptic number.

305404906 is a deficient number, since it is larger than the sum of its proper divisors (152702456).

305404906 is a wasteful number, since it uses less digits than its factorization.

305404906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152702455.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 305404906 is about 17475.8377767705. The cubic root of 305404906 is about 673.4292923288.

The spelling of 305404906 in words is "three hundred five million, four hundred four thousand, nine hundred six".