306387 has 12 divisors (see below), whose sum is σ = 450840. Its totient is φ = 200448.

The previous prime is 306377. The next prime is 306389. The reversal of 306387 is 783603.

It is a happy number.

It is not a de Polignac number, because 306387 - 2⁷ = 306259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 306387.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 306387.

It is not an unprimeable number, because it can be changed into a prime (306389) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 243 + ... + 819.

It is an arithmetic number, because the mean of its divisors is an integer number (37570).

2³⁰⁶³⁸⁷ is an apocalyptic number.

306387 is a deficient number, since it is larger than the sum of its proper divisors (144453).

306387 is a wasteful number, since it uses less digits than its factorization.

306387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642 (or 639 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 306387 is about 553.5223572720. The cubic root of 306387 is about 67.4150371343.

The spelling of 306387 in words is "three hundred six thousand, three hundred eighty-seven".