306808 has 8 divisors (see below), whose sum is σ = 575280. Its totient is φ = 153400.

The previous prime is 306781. The next prime is 306809. The reversal of 306808 is 808603.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×306808² = 188262297728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19168 + ... + 19183.

It is an arithmetic number, because the mean of its divisors is an integer number (71910).

2³⁰⁶⁸⁰⁸ is an apocalyptic number.

It is an amenable number.

306808 is a deficient number, since it is larger than the sum of its proper divisors (268472).

306808 is a wasteful number, since it uses less digits than its factorization.

306808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38357 (or 38353 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 306808 is about 553.9025184994. The cubic root of 306808 is about 67.4459008686.

The spelling of 306808 in words is "three hundred six thousand, eight hundred eight".