306986 has 8 divisors (see below), whose sum is σ = 487620. Its totient is φ = 144448.

The previous prime is 306953. The next prime is 306991. The reversal of 306986 is 689603.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 231361 + 75625 = 481^2 + 275^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 306986.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4481 + ... + 4548.

2³⁰⁶⁹⁸⁶ is an apocalyptic number.

306986 is a deficient number, since it is larger than the sum of its proper divisors (180634).

306986 is a wasteful number, since it uses less digits than its factorization.

306986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9048.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 306986 is about 554.0631732934. The cubic root of 306986 is about 67.4589416514.

The spelling of 306986 in words is "three hundred six thousand, nine hundred eighty-six".