306889 has 8 divisors (see below), whose sum is σ = 349632. Its totient is φ = 266640.

The previous prime is 306883. The next prime is 306893. The reversal of 306889 is 988603.

306889 = 162² + 163² + ... + 172².

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

It is not a de Polignac number, because 306889 - 2⁵ = 306857 is a prime.

It is a Duffinian number.

306889 is a lucky number.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 354 + ... + 859.

It is an arithmetic number, because the mean of its divisors is an integer number (43704).

2³⁰⁶⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

306889 is a deficient number, since it is larger than the sum of its proper divisors (42743).

306889 is a wasteful number, since it uses less digits than its factorization.

306889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 306889 is about 553.9756312330. The cubic root of 306889 is about 67.4518357826.

The spelling of 306889 in words is "three hundred six thousand, eight hundred eighty-nine".