306887 has 6 divisors (see below), whose sum is σ = 357048. Its totient is φ = 263004.

The previous prime is 306883. The next prime is 306893. The reversal of 306887 is 788603.

It is not a de Polignac number, because 306887 - 2² = 306883 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 306887.

It is not an unprimeable number, because it can be changed into a prime (306883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3083 + ... + 3180.

It is an arithmetic number, because the mean of its divisors is an integer number (59508).

2³⁰⁶⁸⁸⁷ is an apocalyptic number.

306887 is a deficient number, since it is larger than the sum of its proper divisors (50161).

306887 is an equidigital number, since it uses as much as digits as its factorization.

306887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6277 (or 6270 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 306887 is about 553.9738260965. The cubic root of 306887 is about 67.4516892541.

The spelling of 306887 in words is "three hundred six thousand, eight hundred eighty-seven".