306386381 has 32 divisors (see below), whose sum is σ = 395151360. Its totient is φ = 231460416.

The previous prime is 306386293. The next prime is 306386401. The reversal of 306386381 is 183683603.

It is a cyclic number.

It is not a de Polignac number, because 306386381 - 2¹⁰ = 306385357 is a prime.

It is a super-2 number, since 2×306386381² = 187745228924554322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306386081) 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 31 ways as a sum of consecutive naturals, for example, 111830 + ... + 114536.

It is an arithmetic number, because the mean of its divisors is an integer number (12348480).

Almost surely, 2^306386381 is an apocalyptic number.

It is an amenable number.

306386381 is a deficient number, since it is larger than the sum of its proper divisors (88764979).

306386381 is a wasteful number, since it uses less digits than its factorization.

306386381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2793.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 306386381 is about 17503.8961662825. The cubic root of 306386381 is about 674.1499173423.

The spelling of 306386381 in words is "three hundred six million, three hundred eighty-six thousand, three hundred eighty-one".