306671140 has 24 divisors (see below), whose sum is σ = 646080120. Its totient is φ = 122274048.

The previous prime is 306671119. The next prime is 306671147. The reversal of 306671140 is 41176603.

It can be written as a sum of positive squares in 4 ways, for example, as 49646116 + 257025024 = 7046^2 + 16032^2 .

It is a junction number, because it is equal to n+sod(n) for n = 306671099 and 306671108.

It is not an unprimeable number, because it can be changed into a prime (306671147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18235 + ... + 30754.

It is an arithmetic number, because the mean of its divisors is an integer number (26920005).

Almost surely, 2^306671140 is an apocalyptic number.

It is an amenable number.

306671140 is an abundant number, since it is smaller than the sum of its proper divisors (339408980).

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

306671140 is a wasteful number, since it uses less digits than its factorization.

306671140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49311 (or 49309 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 306671140 is about 17512.0284376197. The cubic root of 306671140 is about 674.3587068815.

The spelling of 306671140 in words is "three hundred six million, six hundred seventy-one thousand, one hundred forty".