308889 has 12 divisors (see below), whose sum is σ = 510016. Its totient is φ = 176472.

The previous prime is 308887. The next prime is 308899. The reversal of 308889 is 988803.

It is not a de Polignac number, because 308889 - 2¹ = 308887 is a prime.

It is an Ulam number.

It is a Duffinian number.

308889 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308887) 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, 2389 + ... + 2514.

2³⁰⁸⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

308889 is a deficient number, since it is larger than the sum of its proper divisors (201127).

308889 is a wasteful number, since it uses less digits than its factorization.

308889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4916 (or 4913 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 308889 is about 555.7778333111. Note that the first 3 decimals coincide. The cubic root of 308889 is about 67.5980468140.

The spelling of 308889 in words is "three hundred eight thousand, eight hundred eighty-nine".