306130905 has 12 divisors (see below), whose sum is σ = 530626980. Its totient is φ = 163269792.

The previous prime is 306130871. The next prime is 306130949. The reversal of 306130905 is 509031603.

It can be written as a sum of positive squares in 2 ways, for example, as 76790169 + 229340736 = 8763^2 + 15144^2 .

It is not a de Polignac number, because 306130905 - 2⁶ = 306130841 is a prime.

It is a super-2 number, since 2×306130905² = 187432261992238050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3401410 + ... + 3401499.

It is an arithmetic number, because the mean of its divisors is an integer number (44218915).

Almost surely, 2^306130905 is an apocalyptic number.

It is an amenable number.

306130905 is a deficient number, since it is larger than the sum of its proper divisors (224496075).

306130905 is a wasteful number, since it uses less digits than its factorization.

306130905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6802920 (or 6802917 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 27.

The square root of 306130905 is about 17496.5969548367. The cubic root of 306130905 is about 673.9624884100.

The spelling of 306130905 in words is "three hundred six million, one hundred thirty thousand, nine hundred five".